diff --git a/src/NanoVNASaver/Analysis/BandPassAnalysis.py b/src/NanoVNASaver/Analysis/BandPassAnalysis.py
index dfb362e..2d304fa 100644
--- a/src/NanoVNASaver/Analysis/BandPassAnalysis.py
+++ b/src/NanoVNASaver/Analysis/BandPassAnalysis.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
 import math
-from typing import Dict, List
 
 from PyQt6 import QtWidgets
 
@@ -158,13 +157,13 @@ class BandPassAnalysis(Analysis):
         self.set_result(f"Analysis complete ({len(s21)} points)")
 
     def derive_60dB(
-        self, cutoff_pos: Dict[str, int], cutoff_freq: Dict[str, float]
+        self, cutoff_pos: dict[str, int], cutoff_freq: dict[str, float]
     ):
         """derive 60dB cutoff if needed an possible
 
         Args:
-            cutoff_pos (Dict[str, int])
-            cutoff_freq (Dict[str, float])
+            cutoff_pos (dict[str, int])
+            cutoff_freq (dict[str, float])
         """
         if (
             math.isnan(cutoff_freq["60.0dB_l"])
@@ -191,7 +190,7 @@ class BandPassAnalysis(Analysis):
                 )
             )
 
-    def find_center(self, gains: List[float]) -> int:
+    def find_center(self, gains: list[float]) -> int:
         marker = self.app.markers[0]
         if marker.location <= 0 or marker.location >= len(gains) - 1:
             logger.debug(
@@ -207,8 +206,8 @@ class BandPassAnalysis(Analysis):
         return peak
 
     def find_bounderies(
-        self, gains: List[float], peak: int, peak_db: float
-    ) -> Dict[str, int]:
+        self, gains: list[float], peak: int, peak_db: float
+    ) -> dict[str, int]:
         cutoff_pos = {}
         for attn in CUTOFF_VALS:
             cutoff_pos[f"{attn:.1f}dB_l"] = at.cut_off_left(
diff --git a/src/NanoVNASaver/Analysis/BandStopAnalysis.py b/src/NanoVNASaver/Analysis/BandStopAnalysis.py
index da4395f..41ca94b 100644
--- a/src/NanoVNASaver/Analysis/BandStopAnalysis.py
+++ b/src/NanoVNASaver/Analysis/BandStopAnalysis.py
@@ -17,7 +17,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
-from typing import Dict, List
 
 import NanoVNASaver.AnalyticTools as at
 from NanoVNASaver.Analysis.Base import CUTOFF_VALS
@@ -31,12 +30,12 @@ class BandStopAnalysis(BandPassAnalysis):
         super().__init__(app)
         self.set_titel("Band stop filter analysis")
 
-    def find_center(self, gains: List[float]) -> int:
+    def find_center(self, gains: list[float]) -> int:
         return max(enumerate(gains), key=lambda i: i[1])[0]
 
     def find_bounderies(
-        self, gains: List[float], _: int, peak_db: float
-    ) -> Dict[str, int]:
+        self, gains: list[float], _: int, peak_db: float
+    ) -> dict[str, int]:
         cutoff_pos = {}
         for attn in CUTOFF_VALS:
             (
diff --git a/src/NanoVNASaver/Analysis/Base.py b/src/NanoVNASaver/Analysis/Base.py
index db7e77b..8da74cf 100644
--- a/src/NanoVNASaver/Analysis/Base.py
+++ b/src/NanoVNASaver/Analysis/Base.py
@@ -17,7 +17,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
-from typing import Dict
 from PyQt6 import QtWidgets
 
 logger = logging.getLogger(__name__)
@@ -34,7 +33,7 @@ class QHLine(QtWidgets.QFrame):
 class Analysis:
     def __init__(self, app: QtWidgets.QWidget):
         self.app = app
-        self.label: Dict[str, QtWidgets.QLabel] = {
+        self.label: dict[str, QtWidgets.QLabel] = {
             "titel": QtWidgets.QLabel(),
             "result": QtWidgets.QLabel(),
         }
diff --git a/src/NanoVNASaver/Analysis/HighPassAnalysis.py b/src/NanoVNASaver/Analysis/HighPassAnalysis.py
index 4ae3c8a..fbe9711 100644
--- a/src/NanoVNASaver/Analysis/HighPassAnalysis.py
+++ b/src/NanoVNASaver/Analysis/HighPassAnalysis.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
 import math
-from typing import Dict, List
 
 from PyQt6 import QtWidgets
 
@@ -109,7 +108,7 @@ class HighPassAnalysis(Analysis):
 
         self.set_result(f"Analysis complete ({len(s21)}) points)")
 
-    def find_level(self, gains: List[float]) -> int:
+    def find_level(self, gains: list[float]) -> int:
         marker = self.app.markers[0]
         logger.debug("Pass band location: %d", marker.location)
         if marker.location < 0:
@@ -118,8 +117,8 @@ class HighPassAnalysis(Analysis):
         return at.center_from_idx(gains, marker.location)
 
     def find_cutoffs(
-        self, gains: List[float], peak: int, peak_db: float
-    ) -> Dict[str, int]:
+        self, gains: list[float], peak: int, peak_db: float
+    ) -> dict[str, int]:
         return {
             f"{attn:.1f}dB": at.cut_off_left(gains, peak, peak_db, attn)
             for attn in CUTOFF_VALS
diff --git a/src/NanoVNASaver/Analysis/LowPassAnalysis.py b/src/NanoVNASaver/Analysis/LowPassAnalysis.py
index 764e791..a96e61c 100644
--- a/src/NanoVNASaver/Analysis/LowPassAnalysis.py
+++ b/src/NanoVNASaver/Analysis/LowPassAnalysis.py
@@ -17,7 +17,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
-from typing import Dict, List
 
 import NanoVNASaver.AnalyticTools as at
 from NanoVNASaver.Analysis.Base import CUTOFF_VALS
@@ -33,8 +32,8 @@ class LowPassAnalysis(HighPassAnalysis):
         self.set_titel("Lowpass filter analysis")
 
     def find_cutoffs(
-        self, gains: List[float], peak: int, peak_db: float
-    ) -> Dict[str, int]:
+        self, gains: list[float], peak: int, peak_db: float
+    ) -> dict[str, int]:
         return {
             f"{attn:.1f}dB": at.cut_off_right(gains, peak, peak_db, attn)
             for attn in CUTOFF_VALS
diff --git a/src/NanoVNASaver/Analysis/ResonanceAnalysis.py b/src/NanoVNASaver/Analysis/ResonanceAnalysis.py
index 4a6068d..c65f28f 100644
--- a/src/NanoVNASaver/Analysis/ResonanceAnalysis.py
+++ b/src/NanoVNASaver/Analysis/ResonanceAnalysis.py
@@ -19,7 +19,6 @@
 import os
 import csv
 import logging
-from typing import List
 
 from PyQt6 import QtWidgets
 
@@ -44,7 +43,7 @@ def vswr_transformed(z, ratio=49) -> float:
 class ResonanceAnalysis(Analysis):
     def __init__(self, app):
         super().__init__(app)
-        self.crossings: List[int] = []
+        self.crossings: list[int] = []
         self.filename = ""
         self._widget = QtWidgets.QWidget()
         self.layout = QtWidgets.QFormLayout()
diff --git a/src/NanoVNASaver/Analysis/SimplePeakSearchAnalysis.py b/src/NanoVNASaver/Analysis/SimplePeakSearchAnalysis.py
index 52bf25c..80e152b 100644
--- a/src/NanoVNASaver/Analysis/SimplePeakSearchAnalysis.py
+++ b/src/NanoVNASaver/Analysis/SimplePeakSearchAnalysis.py
@@ -17,7 +17,7 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
-from typing import Callable, List, Tuple
+from typing import Callable
 
 from PyQt6 import QtWidgets
 import numpy as np
@@ -102,7 +102,7 @@ class SimplePeakSearchAnalysis(Analysis):
         if self.button["move_marker"].isChecked() and self.app.markers:
             self.app.markers[0].setFrequency(f"{s11[idx_peak].freq}")
 
-    def data_and_format(self) -> Tuple[List[float], Callable]:
+    def data_and_format(self) -> tuple[list[float], Callable]:
         s11 = self.app.data.s11
         s21 = self.app.data.s21
 
diff --git a/src/NanoVNASaver/Analysis/VSWRAnalysis.py b/src/NanoVNASaver/Analysis/VSWRAnalysis.py
index 23769e4..2f6853f 100644
--- a/src/NanoVNASaver/Analysis/VSWRAnalysis.py
+++ b/src/NanoVNASaver/Analysis/VSWRAnalysis.py
@@ -17,7 +17,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
-from typing import List
 
 from PyQt6 import QtWidgets
 
@@ -54,7 +53,7 @@ class VSWRAnalysis(Analysis):
         self.results_label = QtWidgets.QLabel("<b>Results</b>")
         self.layout.addRow(self.results_label)
 
-        self.minimums: List[int] = []
+        self.minimums: list[int] = []
 
     def runAnalysis(self):
         if not self.app.data.s11:
diff --git a/src/NanoVNASaver/AnalyticTools.py b/src/NanoVNASaver/AnalyticTools.py
index c68b8b3..90ede24 100644
--- a/src/NanoVNASaver/AnalyticTools.py
+++ b/src/NanoVNASaver/AnalyticTools.py
@@ -18,7 +18,7 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import itertools as it
 import math
-from typing import Callable, List, Tuple
+from typing import Callable
 
 import numpy as np
 
@@ -28,14 +28,14 @@ from scipy.signal import find_peaks
 from NanoVNASaver.RFTools import Datapoint
 
 
-def zero_crossings(data: List[float]) -> List[int]:
+def zero_crossings(data: list[float]) -> list[int]:
     """find zero crossings
 
     Args:
-        data (List[float]): data list execute
+        data (list[float]): data list execute
 
     Returns:
-        List[int]: sorted indices of zero crossing points
+        list[int]: sorted indices of zero crossing points
     """
     if not data:
         return []
@@ -54,27 +54,27 @@ def zero_crossings(data: List[float]) -> List[int]:
     return sorted(real_zeros + crossings)
 
 
-def maxima(data: List[float], threshold: float = 0.0) -> List[int]:
+def maxima(data: list[float], threshold: float = 0.0) -> list[int]:
     """maxima
 
     Args:
-        data (List[float]): data list to execute
+        data (list[float]): data list to execute
 
     Returns:
-        List[int]: indices of maxima
+        list[int]: indices of maxima
     """
     peaks = find_peaks(data, width=2, distance=3, prominence=1)[0].tolist()
     return [i for i in peaks if data[i] > threshold] if threshold else peaks
 
 
-def minima(data: List[float], threshold: float = 0.0) -> List[int]:
+def minima(data: list[float], threshold: float = 0.0) -> list[int]:
     """minima
 
     Args:
-        data (List[float]): data list to execute
+        data (list[float]): data list to execute
 
     Returns:
-        List[int]: indices of minima
+        list[int]: indices of minima
     """
     bottoms = find_peaks(-np.array(data), width=2, distance=3, prominence=1)[
         0
@@ -83,18 +83,18 @@ def minima(data: List[float], threshold: float = 0.0) -> List[int]:
 
 
 def take_from_idx(
-    data: List[float], idx: int, predicate: Callable
-) -> List[int]:
+    data: list[float], idx: int, predicate: Callable
+) -> list[int]:
     """take_from_center
 
     Args:
-        data (List[float]): data list to execute
+        data (list[float]): data list to execute
         idx (int): index of a start position
         predicate (Callable): predicate on which elements to take
             from center. (e.g. lambda i: i[1] < threshold)
 
     Returns:
-        List[int]: indices of element matching predicate left
+        list[int]: indices of element matching predicate left
                    and right from index
     """
     lower = list(
@@ -111,11 +111,11 @@ def take_from_idx(
     return lower + upper
 
 
-def center_from_idx(gains: List[float], idx: int, delta: float = 3.0) -> int:
+def center_from_idx(gains: list[float], idx: int, delta: float = 3.0) -> int:
     """find maximum from index postion of gains in a attn dB gain span
 
     Args:
-        gains (List[float]): gain values
+        gains (list[float]): gain values
         idx (int): start position to search from
         delta (float, optional): max gain delta from start. Defaults to 3.0.
 
@@ -128,13 +128,13 @@ def center_from_idx(gains: List[float], idx: int, delta: float = 3.0) -> int:
 
 
 def cut_off_left(
-    gains: List[float], idx: int, peak_gain: float, attn: float = 3.0
+    gains: list[float], idx: int, peak_gain: float, attn: float = 3.0
 ) -> int:
     """find first position in list where gain in attn lower then peak
     left from index
 
     Args:
-        gains (List[float]): gain values
+        gains (list[float]): gain values
         idx (int): start position to search from
         peak_gain (float): reference gain value
         attn (float, optional): attenuation to search position for.
@@ -149,13 +149,13 @@ def cut_off_left(
 
 
 def cut_off_right(
-    gains: List[float], idx: int, peak_gain: float, attn: float = 3.0
+    gains: list[float], idx: int, peak_gain: float, attn: float = 3.0
 ) -> int:
     """find first position in list where gain in attn lower then peak
     right from index
 
     Args:
-        gains (List[float]): gain values
+        gains (list[float]): gain values
         idx (int): start position to search from
         peak_gain (float): reference gain value
         attn (float, optional): attenuation to search position for.
@@ -171,15 +171,15 @@ def cut_off_right(
 
 
 def dip_cut_offs(
-    gains: List[float], peak_gain: float, attn: float = 3.0
-) -> Tuple[int, int]:
+    gains: list[float], peak_gain: float, attn: float = 3.0
+) -> tuple[int, int]:
     rng = np.where(np.array(gains) < (peak_gain - attn))[0].tolist()
     return (rng[0], rng[-1]) if rng else (math.nan, math.nan)
 
 
 def calculate_rolloff(
-    s21: List[Datapoint], idx_1: int, idx_2: int
-) -> Tuple[float, float]:
+    s21: list[Datapoint], idx_1: int, idx_2: int
+) -> tuple[float, float]:
     if idx_1 == idx_2:
         return (math.nan, math.nan)
     freq_1, freq_2 = s21[idx_1].freq, s21[idx_2].freq
diff --git a/src/NanoVNASaver/Calibration.py b/src/NanoVNASaver/Calibration.py
index 2ab6979..377de55 100644
--- a/src/NanoVNASaver/Calibration.py
+++ b/src/NanoVNASaver/Calibration.py
@@ -23,7 +23,6 @@ import os
 import re
 from collections import defaultdict, UserDict
 from dataclasses import dataclass
-from typing import List
 
 from scipy.interpolate import interp1d
 
@@ -235,7 +234,7 @@ class CalDataSet(UserDict):
         setattr(self.data[freq], name, (dp.z))
         self.data[freq].freq = freq
 
-    def frequencies(self) -> List[int]:
+    def frequencies(self) -> list[int]:
         return sorted(self.data.keys())
 
     def get(self, key: int, default: CalData = None) -> CalData:
@@ -276,7 +275,7 @@ class Calibration:
 
         self.source = "Manual"
 
-    def insert(self, name: str, data: List[Datapoint]):
+    def insert(self, name: str, data: list[Datapoint]):
         for dp in data:
             self.dataset.insert(name, dp)
 
diff --git a/src/NanoVNASaver/Charts/CLogMag.py b/src/NanoVNASaver/Charts/CLogMag.py
index 7db9a71..cde140e 100644
--- a/src/NanoVNASaver/Charts/CLogMag.py
+++ b/src/NanoVNASaver/Charts/CLogMag.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import math
 import logging
-from typing import List
 
 from PyQt6 import QtGui
 
@@ -33,11 +32,11 @@ class CombinedLogMagChart(LogMagChart):
     def __init__(self, name=""):
         super().__init__(name)
 
-        self.data11: List[Datapoint] = []
-        self.data21: List[Datapoint] = []
+        self.data11: list[Datapoint] = []
+        self.data21: list[Datapoint] = []
 
-        self.reference11: List[Datapoint] = []
-        self.reference21: List[Datapoint] = []
+        self.reference11: list[Datapoint] = []
+        self.reference21: list[Datapoint] = []
 
     def setCombinedData(self, data11, data21):
         self.data11 = data11
diff --git a/src/NanoVNASaver/Charts/Chart.py b/src/NanoVNASaver/Charts/Chart.py
index 6ab7a17..5ec26de 100644
--- a/src/NanoVNASaver/Charts/Chart.py
+++ b/src/NanoVNASaver/Charts/Chart.py
@@ -19,7 +19,7 @@
 import logging
 
 from dataclasses import dataclass, field, replace
-from typing import List, Set, Tuple, ClassVar, Any, Optional
+from typing import ClassVar, Any
 
 from PyQt6 import QtWidgets, QtGui, QtCore
 from PyQt6.QtCore import pyqtSignal, Qt
@@ -67,8 +67,8 @@ class ChartDimensions:
 
 @dataclass
 class ChartDragBox:
-    pos: Tuple[int] = (-1, -1)
-    pos_start: Tuple[int] = (0, 0)
+    pos: tuple[int] = (-1, -1)
+    pos_start: tuple[int] = (0, 0)
     state: bool = False
     move_x: int = -1
     move_y: int = -1
@@ -128,11 +128,11 @@ class Chart(QtWidgets.QWidget):
 
         self.draggedMarker = None
 
-        self.data: List[Datapoint] = []
-        self.reference: List[Datapoint] = []
+        self.data: list[Datapoint] = []
+        self.reference: list[Datapoint] = []
 
-        self.markers: List[Marker] = []
-        self.swrMarkers: Set[float] = set()
+        self.markers: list[Marker] = []
+        self.swrMarkers: set[float] = set()
 
         self.action_popout = QAction("Popout chart")
         self.action_popout.triggered.connect(
@@ -192,7 +192,7 @@ class Chart(QtWidgets.QWidget):
             None,
         )
 
-    def getNearestMarker(self, x, y) -> Optional[Marker]:
+    def getNearestMarker(self, x, y) -> Marker | None:
         if not self.data:
             return None
         shortest = 10**6
@@ -205,7 +205,7 @@ class Chart(QtWidgets.QWidget):
                 nearest = m
         return nearest
 
-    def getPosition(self, d: Datapoint) -> Tuple[int, int]:
+    def getPosition(self, d: Datapoint) -> tuple[int, int]:
         return self.getXPosition(d), self.getYPosition(d)
 
     def setDrawLines(self, draw_lines):
diff --git a/src/NanoVNASaver/Charts/Frequency.py b/src/NanoVNASaver/Charts/Frequency.py
index a5e467d..1599b3d 100644
--- a/src/NanoVNASaver/Charts/Frequency.py
+++ b/src/NanoVNASaver/Charts/Frequency.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import math
 import logging
-from typing import List, Tuple
 
 import numpy as np
 from PyQt6 import QtWidgets, QtGui, QtCore
@@ -405,7 +404,7 @@ class FrequencyChart(Chart):
         step = span / self.dim.width
         return round(self.fstart + absx * step)
 
-    def valueAtPosition(self, y) -> List[float]:
+    def valueAtPosition(self, y) -> list[float]:
         """
         Returns the chart-specific value(s) at the specified Y-position
         :param y: The Y position to calculate for.
@@ -493,7 +492,7 @@ class FrequencyChart(Chart):
             self.drawDragbog(qp)
         qp.end()
 
-    def _data_oob(self, data: List[Datapoint]) -> bool:
+    def _data_oob(self, data: list[Datapoint]) -> bool:
         return data[0].freq > self.fstop or self.data[-1].freq < self.fstart
 
     def _check_frequency_boundaries(self, qp: QtGui.QPainter):
@@ -605,7 +604,7 @@ class FrequencyChart(Chart):
         self.drawData(qp, self.reference, Chart.color.reference)
         self.drawMarkers(qp)
 
-    def _find_scaling(self) -> Tuple[float, float]:
+    def _find_scaling(self) -> tuple[float, float]:
         min_value = self.minDisplayValue / 10e11
         max_value = self.maxDisplayValue / 10e11
         if self.fixedValues:
@@ -686,7 +685,7 @@ class FrequencyChart(Chart):
     def drawData(
         self,
         qp: QtGui.QPainter,
-        data: List[Datapoint],
+        data: list[Datapoint],
         color: QtGui.QColor,
         y_function=None,
     ):
diff --git a/src/NanoVNASaver/Charts/GroupDelay.py b/src/NanoVNASaver/Charts/GroupDelay.py
index dc30390..ed76908 100644
--- a/src/NanoVNASaver/Charts/GroupDelay.py
+++ b/src/NanoVNASaver/Charts/GroupDelay.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import math
 import logging
-from typing import List
 
 import numpy as np
 
@@ -74,7 +73,7 @@ class GroupDelayChart(FrequencyChart):
         self.groupDelayReference = self.calc_data(self.reference)
         self.update()
 
-    def calc_data(self, data: List[Datapoint]):
+    def calc_data(self, data: list[Datapoint]):
         data_len = len(data)
         if data_len <= 1:
             return []
@@ -172,8 +171,8 @@ class GroupDelayChart(FrequencyChart):
         self,
         qp: QtGui.QPainter,
         color: QtGui.QColor,
-        data: List[Datapoint],
-        delay: List[Datapoint],
+        data: list[Datapoint],
+        delay: list[Datapoint],
     ):
         pen = QtGui.QPen(color)
         pen.setWidth(self.dim.point)
@@ -216,7 +215,7 @@ class GroupDelayChart(FrequencyChart):
             (self.maxDelay - delay) / self.span * self.dim.height
         )
 
-    def valueAtPosition(self, y) -> List[float]:
+    def valueAtPosition(self, y) -> list[float]:
         absy = y - self.topMargin
         val = -1 * ((absy / self.dim.height * self.span) - self.maxDelay)
         return [val]
diff --git a/src/NanoVNASaver/Charts/LogMag.py b/src/NanoVNASaver/Charts/LogMag.py
index c6736ba..d929c5b 100644
--- a/src/NanoVNASaver/Charts/LogMag.py
+++ b/src/NanoVNASaver/Charts/LogMag.py
@@ -19,7 +19,6 @@
 from dataclasses import dataclass
 import math
 import logging
-from typing import List
 
 from PyQt6 import QtGui
 
@@ -165,7 +164,7 @@ class LogMagChart(FrequencyChart):
             (self.maxValue - logMag) / self.span * self.dim.height
         )
 
-    def valueAtPosition(self, y) -> List[float]:
+    def valueAtPosition(self, y) -> list[float]:
         absy = y - self.topMargin
         val = -1 * ((absy / self.dim.height * self.span) - self.maxValue)
         return [val]
diff --git a/src/NanoVNASaver/Charts/Magnitude.py b/src/NanoVNASaver/Charts/Magnitude.py
index 0f7a912..dcff5f8 100644
--- a/src/NanoVNASaver/Charts/Magnitude.py
+++ b/src/NanoVNASaver/Charts/Magnitude.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import math
 import logging
-from typing import List
 
 from PyQt6 import QtGui
 
@@ -127,7 +126,7 @@ class MagnitudeChart(FrequencyChart):
             (self.maxValue - mag) / self.span * self.dim.height
         )
 
-    def valueAtPosition(self, y) -> List[float]:
+    def valueAtPosition(self, y) -> list[float]:
         absy = y - self.topMargin
         val = -1 * ((absy / self.dim.height * self.span) - self.maxValue)
         return [val]
diff --git a/src/NanoVNASaver/Charts/MagnitudeZ.py b/src/NanoVNASaver/Charts/MagnitudeZ.py
index 32cd2d6..b051a3d 100644
--- a/src/NanoVNASaver/Charts/MagnitudeZ.py
+++ b/src/NanoVNASaver/Charts/MagnitudeZ.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import math
 import logging
-from typing import List
 
 from PyQt6 import QtGui
 
@@ -129,7 +128,7 @@ class MagnitudeZChart(FrequencyChart):
             )
         return self.topMargin
 
-    def valueAtPosition(self, y) -> List[float]:
+    def valueAtPosition(self, y) -> list[float]:
         absy = y - self.topMargin
         if self.logarithmicY:
             span = math.log(self.maxValue) - math.log(self.minValue)
diff --git a/src/NanoVNASaver/Charts/Permeability.py b/src/NanoVNASaver/Charts/Permeability.py
index aadda3e..8544d0e 100644
--- a/src/NanoVNASaver/Charts/Permeability.py
+++ b/src/NanoVNASaver/Charts/Permeability.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import math
 import logging
-from typing import List
 
 from PyQt6 import QtGui
 
@@ -325,7 +324,7 @@ class PermeabilityChart(FrequencyChart):
             self.topMargin + (self.max - re) / self.span * self.dim.height
         )
 
-    def valueAtPosition(self, y) -> List[float]:
+    def valueAtPosition(self, y) -> list[float]:
         absy = y - self.topMargin
         if self.logarithmicY:
             min_val = self.max - self.span
diff --git a/src/NanoVNASaver/Charts/Phase.py b/src/NanoVNASaver/Charts/Phase.py
index d743670..aad256b 100644
--- a/src/NanoVNASaver/Charts/Phase.py
+++ b/src/NanoVNASaver/Charts/Phase.py
@@ -19,7 +19,6 @@
 import math
 import logging
 
-from typing import List
 import numpy as np
 
 from PyQt6.QtGui import QAction, QPainter, QPen
@@ -151,7 +150,7 @@ class PhaseChart(FrequencyChart):
             (self.maxAngle - angle) / self.span * self.dim.height
         )
 
-    def valueAtPosition(self, y) -> List[float]:
+    def valueAtPosition(self, y) -> list[float]:
         absy = y - self.topMargin
         val = -1 * ((absy / self.dim.height * self.span) - self.maxAngle)
         return [val]
diff --git a/src/NanoVNASaver/Charts/QFactor.py b/src/NanoVNASaver/Charts/QFactor.py
index 3986a96..df5aa89 100644
--- a/src/NanoVNASaver/Charts/QFactor.py
+++ b/src/NanoVNASaver/Charts/QFactor.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import math
 import logging
-from typing import List
 
 from PyQt6 import QtGui
 
@@ -127,7 +126,7 @@ class QualityFactorChart(FrequencyChart):
             (self.maxQ - Q) / self.span * self.dim.height
         )
 
-    def valueAtPosition(self, y) -> List[float]:
+    def valueAtPosition(self, y) -> list[float]:
         absy = y - self.topMargin
         val = -1 * ((absy / self.dim.height * self.span) - self.maxQ)
         return [val]
diff --git a/src/NanoVNASaver/Charts/RI.py b/src/NanoVNASaver/Charts/RI.py
index a64fda0..2690e22 100644
--- a/src/NanoVNASaver/Charts/RI.py
+++ b/src/NanoVNASaver/Charts/RI.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import math
 import logging
-from typing import List, Optional
 
 from PyQt6 import QtWidgets, QtGui
 
@@ -381,7 +380,7 @@ class RealImaginaryChart(FrequencyChart):
             else self.topMargin
         )
 
-    def valueAtPosition(self, y) -> List[float]:
+    def valueAtPosition(self, y) -> list[float]:
         absy = y - self.topMargin
         valRe = -1 * ((absy / self.dim.height * self.span_real) - self.max_real)
         valIm = -1 * ((absy / self.dim.height * self.span_imag) - self.max_imag)
@@ -408,7 +407,7 @@ class RealImaginaryChart(FrequencyChart):
 
         self.update()
 
-    def getNearestMarker(self, x, y) -> Optional[Marker]:
+    def getNearestMarker(self, x, y) -> Marker | None:
         if not self.data:
             return None
         shortest = 10e6
diff --git a/src/NanoVNASaver/Charts/RIZ.py b/src/NanoVNASaver/Charts/RIZ.py
index 5e97489..f1a810e 100644
--- a/src/NanoVNASaver/Charts/RIZ.py
+++ b/src/NanoVNASaver/Charts/RIZ.py
@@ -18,7 +18,7 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
 
-from PyQt6 import QtWidgets, QtGui
+from PyQt6 import QtGui
 
 from NanoVNASaver.Formatting import format_frequency_chart
 from NanoVNASaver.RFTools import Datapoint
diff --git a/src/NanoVNASaver/Charts/SParam.py b/src/NanoVNASaver/Charts/SParam.py
index 09f6cb9..4d1e8e8 100644
--- a/src/NanoVNASaver/Charts/SParam.py
+++ b/src/NanoVNASaver/Charts/SParam.py
@@ -17,7 +17,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
-from typing import List
 
 from PyQt6 import QtGui
 
@@ -142,7 +141,7 @@ class SParameterChart(FrequencyChart):
             + (self.maxValue - d.im) / self.span * self.dim.height
         )
 
-    def valueAtPosition(self, y) -> List[float]:
+    def valueAtPosition(self, y) -> list[float]:
         absy = y - self.topMargin
         val = -1 * ((absy / self.dim.height * self.span) - self.maxValue)
         return [val]
diff --git a/src/NanoVNASaver/Charts/Square.py b/src/NanoVNASaver/Charts/Square.py
index dd5ab16..ff66db8 100644
--- a/src/NanoVNASaver/Charts/Square.py
+++ b/src/NanoVNASaver/Charts/Square.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
 import math
-from typing import List
 
 from PyQt6 import QtGui, QtCore, QtWidgets
 
@@ -58,7 +57,7 @@ class SquareChart(Chart):
         self,
         qp: QtGui.QPainter,
         color: QtGui.QColor,
-        data: List[Datapoint],
+        data: list[Datapoint],
         fstart: int = 0,
         fstop: int = 0,
     ):
diff --git a/src/NanoVNASaver/Charts/VSWR.py b/src/NanoVNASaver/Charts/VSWR.py
index f0efe18..73d8a28 100644
--- a/src/NanoVNASaver/Charts/VSWR.py
+++ b/src/NanoVNASaver/Charts/VSWR.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import math
 import logging
-from typing import List
 
 from PyQt6 import QtGui
 
@@ -166,7 +165,7 @@ class VSWRChart(FrequencyChart):
     def getYPosition(self, d: Datapoint) -> int:
         return self.getYPositionFromValue(d.vswr)
 
-    def valueAtPosition(self, y) -> List[float]:
+    def valueAtPosition(self, y) -> list[float]:
         absy = y - self.topMargin
         if self.logarithmicY:
             min_val = self.maxVSWR - self.span
diff --git a/src/NanoVNASaver/Defaults.py b/src/NanoVNASaver/Defaults.py
index e7c32ec..0a29481 100644
--- a/src/NanoVNASaver/Defaults.py
+++ b/src/NanoVNASaver/Defaults.py
@@ -62,7 +62,7 @@ class Chart:
     marker_size: int = 8
     returnloss_is_positive: bool = False
     show_bands: bool = False
-    vswr_lines: list = DC.field(default_factory=lambda: [])
+    vswr_lines: list = DC.field(default_factory=list)
 
 
 @DC.dataclass
@@ -126,11 +126,11 @@ class Markers:
 
 @DC.dataclass
 class CFG:
-    gui: object = DC.field(default_factory=lambda: GUI())
-    charts_selected: object = DC.field(default_factory=lambda: ChartsSelected())
-    chart: object = DC.field(default_factory=lambda: Chart())
-    chart_colors: object = DC.field(default_factory=lambda: ChartColors())
-    markers: object = DC.field(default_factory=lambda: Markers())
+    gui: object = DC.field(default_factory=GUI)
+    charts_selected: object = DC.field(default_factory=ChartsSelected)
+    chart: object = DC.field(default_factory=Chart)
+    chart_colors: object = DC.field(default_factory=ChartColors)
+    markers: object = DC.field(default_factory=Markers)
 
 
 cfg = CFG()
@@ -159,9 +159,9 @@ def store(settings: "AppSettings", data: CFG = None) -> None:
 
 def from_type(data) -> str:
     type_map = {
-        bytearray: lambda x: x.hex(),
-        QColor: lambda x: x.getRgb(),
-        QByteArray: lambda x: x.toHex(),
+        bytearray: bytearray.hex,
+        QColor: QColor.getRgb,
+        QByteArray: QByteArray.toHex,
     }
     return (
         f"{type_map[type(data)](data)}" if type(data) in type_map else f"{data}"
diff --git a/src/NanoVNASaver/Formatting.py b/src/NanoVNASaver/Formatting.py
index 6a1093a..cbdab27 100644
--- a/src/NanoVNASaver/Formatting.py
+++ b/src/NanoVNASaver/Formatting.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import math
 from numbers import Number
-from typing import Union
 
 from NanoVNASaver import SITools
 
@@ -55,7 +54,7 @@ def format_frequency(freq: Number) -> str:
     return str(SITools.Value(freq, "Hz", FMT_FREQ))
 
 
-def format_frequency_inputs(freq: Union[Number, str]) -> str:
+def format_frequency_inputs(freq: Number | str) -> str:
     return str(SITools.Value(freq, "Hz", FMT_FREQ_INPUTS))
 
 
diff --git a/src/NanoVNASaver/Hardware/Hardware.py b/src/NanoVNASaver/Hardware/Hardware.py
index faa352a..b63f5f3 100644
--- a/src/NanoVNASaver/Hardware/Hardware.py
+++ b/src/NanoVNASaver/Hardware/Hardware.py
@@ -20,7 +20,6 @@ import logging
 import platform
 from collections import namedtuple
 from time import sleep
-from typing import List
 
 import serial
 from serial.tools import list_ports
@@ -91,7 +90,7 @@ def usb_typename(device: ListPortInfo) -> str:
 # Get list of interfaces with VNAs connected
 
 
-def get_interfaces() -> List[Interface]:
+def get_interfaces() -> list[Interface]:
     interfaces = []
     # serial like usb interfaces
     for d in list_ports.comports():
@@ -117,7 +116,7 @@ def get_interfaces() -> List[Interface]:
     return interfaces
 
 
-def get_portinfos() -> List[str]:
+def get_portinfos() -> list[str]:
     portinfos = []
     # serial like usb interfaces
     for d in list_ports.comports():
diff --git a/src/NanoVNASaver/Hardware/NanoVNA.py b/src/NanoVNASaver/Hardware/NanoVNA.py
index d836341..1fd2250 100644
--- a/src/NanoVNASaver/Hardware/NanoVNA.py
+++ b/src/NanoVNASaver/Hardware/NanoVNA.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
 import struct
-from typing import List
 
 import serial
 import numpy as np
@@ -123,7 +122,7 @@ class NanoVNA(VNA):
             self.features.add("Scan command")
             self.sweep_method = "scan"
 
-    def readFrequencies(self) -> List[int]:
+    def readFrequencies(self) -> list[int]:
         logger.debug("readFrequencies: %s", self.sweep_method)
         if self.sweep_method != "scan_mask":
             return super().readFrequencies()
@@ -134,7 +133,7 @@ class NanoVNA(VNA):
             )
         ]
 
-    def readValues(self, value) -> List[str]:
+    def readValues(self, value) -> list[str]:
         if self.sweep_method != "scan_mask":
             return super().readValues(value)
         logger.debug("readValue with scan mask (%s)", value)
diff --git a/src/NanoVNASaver/Hardware/NanoVNA_V2.py b/src/NanoVNASaver/Hardware/NanoVNA_V2.py
index d49364b..d9b8c1b 100644
--- a/src/NanoVNASaver/Hardware/NanoVNA_V2.py
+++ b/src/NanoVNASaver/Hardware/NanoVNA_V2.py
@@ -20,7 +20,6 @@ import logging
 import platform
 from struct import pack, unpack_from
 from time import sleep
-from typing import List
 
 from NanoVNASaver.Hardware.Serial import Interface
 from NanoVNASaver.Hardware.VNA import VNA
@@ -131,7 +130,7 @@ class NanoVNA_V2(VNA):
         logger.debug("readFirmware: %s", result)
         return result
 
-    def readFrequencies(self) -> List[int]:
+    def readFrequencies(self) -> list[int]:
         return [
             int(self.sweepStartHz + i * self.sweepStepHz)
             for i in range(self.datapoints)
@@ -159,7 +158,7 @@ class NanoVNA_V2(VNA):
 
         logger.debug("Freq index to: %i", freq_index)
 
-    def readValues(self, value) -> List[str]:
+    def readValues(self, value) -> list[str]:
         # Actually grab the data only when requesting channel 0.
         # The hardware will return all channels which we will store.
         if value == "data 0":
diff --git a/src/NanoVNASaver/Hardware/TinySA.py b/src/NanoVNASaver/Hardware/TinySA.py
index cc741d5..09a4ed9 100644
--- a/src/NanoVNASaver/Hardware/TinySA.py
+++ b/src/NanoVNASaver/Hardware/TinySA.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
 import struct
-from typing import List
 
 import serial
 import numpy as np
@@ -109,11 +108,11 @@ class TinySA(VNA):
         list(self.exec_command(f"sweep {start} {stop} {self.datapoints}"))
         list(self.exec_command("trigger auto"))
 
-    def readFrequencies(self) -> List[int]:
+    def readFrequencies(self) -> list[int]:
         logger.debug("readFrequencies")
         return [int(line) for line in self.exec_command("frequencies")]
 
-    def readValues(self, value) -> List[str]:
+    def readValues(self, value) -> list[str]:
         def conv2float(data: str) -> float:
             try:
                 return 10 ** (float(data.strip()) / 20)
diff --git a/src/NanoVNASaver/Hardware/VNA.py b/src/NanoVNASaver/Hardware/VNA.py
index a429ebd..361efca 100644
--- a/src/NanoVNASaver/Hardware/VNA.py
+++ b/src/NanoVNASaver/Hardware/VNA.py
@@ -18,7 +18,7 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
 from time import sleep
-from typing import List, Iterator, Set
+from typing import Iterator
 
 from PyQt6 import QtGui
 
@@ -131,7 +131,7 @@ class VNA:
         if len(self.valid_datapoints) > 1:
             self.features.add("Customizable data points")
 
-    def get_bandwidths(self) -> List[int]:
+    def get_bandwidths(self) -> list[int]:
         logger.debug("get bandwidths")
         if self.bw_method == "dislord":
             return list(DISLORD_BW.keys())
@@ -153,7 +153,7 @@ class VNA:
             raise IOError(f"set_bandwith({bandwidth}: {result}")
         self.bandwidth = bandwidth
 
-    def readFrequencies(self) -> List[int]:
+    def readFrequencies(self) -> list[int]:
         return [int(f) for f in self.readValues("frequencies")]
 
     def resetSweep(self, start: int, stop: int):
@@ -170,7 +170,7 @@ class VNA:
     def connected(self) -> bool:
         return self.serial.is_open
 
-    def getFeatures(self) -> Set[str]:
+    def getFeatures(self) -> set[str]:
         return self.features
 
     def getCalibration(self) -> str:
@@ -194,7 +194,7 @@ class VNA:
         logger.debug("result:\n%s", result)
         return result
 
-    def readValues(self, value) -> List[str]:
+    def readValues(self, value) -> list[str]:
         logger.debug("VNA reading %s", value)
         result = list(self.exec_command(value))
         logger.debug("VNA done reading %s (%d values)", value, len(result))
diff --git a/src/NanoVNASaver/Marker/Values.py b/src/NanoVNASaver/Marker/Values.py
index 97b0a81..be9d33a 100644
--- a/src/NanoVNASaver/Marker/Values.py
+++ b/src/NanoVNASaver/Marker/Values.py
@@ -17,7 +17,7 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-from typing import List, NamedTuple
+from typing import NamedTuple
 from NanoVNASaver.RFTools import Datapoint
 
 
@@ -71,16 +71,13 @@ class Value:
     """Contains the data area to calculate marker values from"""
 
     def __init__(
-        self,
-        freq: int = 0,
-        s11: List[Datapoint] = None,
-        s21: List[Datapoint] = None,
+            self,
     ):
-        self.freq = freq
-        self.s11 = [] if s11 is None else s11[:]
-        self.s21 = [] if s21 is None else s21[:]
+        self.freq: int = 0
+        self.s11: list[Datapoint] = []
+        self.s21: list[Datapoint] = []
 
-    def store(self, index: int, s11: List[Datapoint], s21: List[Datapoint]):
+    def store(self, index: int, s11: list[Datapoint], s21: list[Datapoint]):
         # handle boundaries
         if index == 0:
             index = 1
diff --git a/src/NanoVNASaver/Marker/Widget.py b/src/NanoVNASaver/Marker/Widget.py
index 44a0696..df41495 100644
--- a/src/NanoVNASaver/Marker/Widget.py
+++ b/src/NanoVNASaver/Marker/Widget.py
@@ -17,7 +17,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import math
-from typing import List
 
 from PyQt6 import QtGui, QtWidgets, QtCore
 from PyQt6.QtCore import pyqtSignal
@@ -253,7 +252,7 @@ class Marker(QtCore.QObject, Value):
     def getRow(self):
         return QtWidgets.QLabel(self.name), self.layout
 
-    def findLocation(self, data: List[RFTools.Datapoint]):
+    def findLocation(self, data: list[RFTools.Datapoint]):
         self.location = -1
         self.frequencyInput.nextFrequency = -1
         self.frequencyInput.previousFrequency = -1
@@ -298,7 +297,7 @@ class Marker(QtCore.QObject, Value):
             v.setText("")
 
     def updateLabels(
-        self, s11: List[RFTools.Datapoint], s21: List[RFTools.Datapoint]
+        self, s11: list[RFTools.Datapoint], s21: list[RFTools.Datapoint]
     ):
         if not s11:
             return
diff --git a/src/NanoVNASaver/RFTools.py b/src/NanoVNASaver/RFTools.py
index 7948384..3a25387 100644
--- a/src/NanoVNASaver/RFTools.py
+++ b/src/NanoVNASaver/RFTools.py
@@ -18,7 +18,7 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import math
 import cmath
-from typing import List, NamedTuple
+from typing import NamedTuple
 
 from NanoVNASaver.SITools import Format, clamp_value
 
@@ -92,7 +92,7 @@ def gamma_to_impedance(gamma: complex, ref_impedance: float = 50) -> complex:
         return math.inf
 
 
-def groupDelay(data: List[Datapoint], index: int) -> float:
+def groupDelay(data: list[Datapoint], index: int) -> float:
     idx0 = clamp_value(index - 1, 0, len(data) - 1)
     idx1 = clamp_value(index + 1, 0, len(data) - 1)
     delta_angle = data[idx1].phase - data[idx0].phase
@@ -147,7 +147,7 @@ def serial_to_parallel(z: complex) -> complex:
     return complex(z_sq_sum / z.real, z_sq_sum / z.imag)
 
 
-def corr_att_data(data: List[Datapoint], att: float) -> List[Datapoint]:
+def corr_att_data(data: list[Datapoint], att: float) -> list[Datapoint]:
     """Correct the ratio for a given attenuation on s21 input"""
     if att <= 0:
         return data
diff --git a/src/NanoVNASaver/Settings/Sweep.py b/src/NanoVNASaver/Settings/Sweep.py
index 57509a2..d5aef9e 100644
--- a/src/NanoVNASaver/Settings/Sweep.py
+++ b/src/NanoVNASaver/Settings/Sweep.py
@@ -17,10 +17,11 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
+from dataclasses import dataclass, replace
 from enum import Enum
 from math import log
 from threading import Lock
-from typing import Iterator, Tuple
+from typing import Iterator, NamedTuple
 
 logger = logging.getLogger(__name__)
 
@@ -31,63 +32,28 @@ class SweepMode(Enum):
     AVERAGE = 2
 
 
-class Properties:
-    def __init__(
-        self,
-        name: str = "",
-        mode: "SweepMode" = SweepMode.SINGLE,
-        averages: Tuple[int, int] = (3, 0),
-        logarithmic: bool = False,
-    ):
-        self.name = name
-        self.mode = mode
-        self.averages = averages
-        self.logarithmic = logarithmic
-
-    def __repr__(self):
-        return (
-            f"Properties('{self.name}', {self.mode}, {self.averages},"
-            f" {self.logarithmic})"
-        )
+class Properties(NamedTuple):
+    name: str = ""
+    mode: "SweepMode" = SweepMode.SINGLE
+    averages: tuple[int, int] = (3, 0)
+    logarithmic: bool = False
 
 
+@dataclass
 class Sweep:
-    def __init__(
-        self,
-        start: int = 3600000,
-        end: int = 30000000,
-        points: int = 101,
-        segments: int = 1,
-        properties: "Properties" = Properties(),
-    ):
-        self.start = start
-        self.end = end
-        self.points = points
-        self.segments = segments
-        self.properties = properties
+    start: int = 3600000
+    end: int = 30000000
+    points: int = 101
+    segments: int = 1
+    properties: "Properties" = Properties()
+
+    def __post_init__(self):
         self.lock = Lock()
         self.check()
         logger.debug("%s", self)
 
-    def __repr__(self) -> str:
-        return (
-            f"Sweep({self.start}, {self.end}, {self.points}, {self.segments},"
-            f" {self.properties})"
-        )
-
-    def __eq__(self, other) -> bool:
-        return (
-            self.start == other.start
-            and self.end == other.end
-            and self.points == other.points
-            and self.segments == other.segments
-            and self.properties == other.properties
-        )
-
     def copy(self) -> "Sweep":
-        return Sweep(
-            self.start, self.end, self.points, self.segments, self.properties
-        )
+        return replace(self)
 
     @property
     def span(self) -> int:
@@ -110,7 +76,7 @@ class Sweep:
     def _exp_factor(self, index: int) -> float:
         return 1 - log(self.segments + 1 - index) / log(self.segments + 1)
 
-    def get_index_range(self, index: int) -> Tuple[int, int]:
+    def get_index_range(self, index: int) -> tuple[int, int]:
         if not self.properties.logarithmic:
             start = self.start + index * self.points * self.stepsize
             end = start + (self.points - 1) * self.stepsize
diff --git a/src/NanoVNASaver/SweepWorker.py b/src/NanoVNASaver/SweepWorker.py
index f384682..3cae9bc 100644
--- a/src/NanoVNASaver/SweepWorker.py
+++ b/src/NanoVNASaver/SweepWorker.py
@@ -18,7 +18,6 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
 from time import sleep
-from typing import List, Tuple
 
 import numpy as np
 from PyQt6 import QtCore, QtWidgets
@@ -31,7 +30,7 @@ from NanoVNASaver.Settings.Sweep import Sweep, SweepMode
 logger = logging.getLogger(__name__)
 
 
-def truncate(values: List[List[Tuple]], count: int) -> List[List[Tuple]]:
+def truncate(values: list[list[tuple]], count: int) -> list[list[tuple]]:
     """truncate drops extrema from data list if averaging is active"""
     keep = len(values) - count
     logger.debug("Truncating from %d values to %d", len(values), keep)
@@ -62,10 +61,10 @@ class SweepWorker(QtCore.QRunnable):
         self.sweep = Sweep()
         self.setAutoDelete(False)
         self.percentage = 0
-        self.data11: List[Datapoint] = []
-        self.data21: List[Datapoint] = []
-        self.rawData11: List[Datapoint] = []
-        self.rawData21: List[Datapoint] = []
+        self.data11: list[Datapoint] = []
+        self.data21: list[Datapoint] = []
+        self.rawData11: list[Datapoint] = []
+        self.rawData21: list[Datapoint] = []
         self.init_data()
         self.stopped = False
         self.running = False
@@ -187,10 +186,10 @@ class SweepWorker(QtCore.QRunnable):
         self.signals.updated.emit()
 
     def applyCalibration(
-        self, raw_data11: List[Datapoint], raw_data21: List[Datapoint]
-    ) -> Tuple[List[Datapoint], List[Datapoint]]:
-        data11: List[Datapoint] = []
-        data21: List[Datapoint] = []
+        self, raw_data11: list[Datapoint], raw_data21: list[Datapoint]
+    ) -> tuple[list[Datapoint], list[Datapoint]]:
+        data11: list[Datapoint] = []
+        data21: list[Datapoint] = []
 
         if not self.app.calibration.isCalculated:
             data11 = raw_data11.copy()
diff --git a/src/NanoVNASaver/Touchstone.py b/src/NanoVNASaver/Touchstone.py
index 2a9a7f9..4e09814 100644
--- a/src/NanoVNASaver/Touchstone.py
+++ b/src/NanoVNASaver/Touchstone.py
@@ -22,8 +22,6 @@ import cmath
 import io
 from operator import attrgetter
 
-from typing import List
-
 from scipy.interpolate import interp1d
 
 from NanoVNASaver.RFTools import Datapoint
@@ -108,42 +106,42 @@ class Touchstone:
         self._interp = {}
 
     @property
-    def s11(self) -> List[Datapoint]:
+    def s11(self) -> list[Datapoint]:
         return self.s("11")
 
     @s11.setter
-    def s11(self, value: List[Datapoint]):
+    def s11(self, value: list[Datapoint]):
         self.sdata[0] = value
 
     @property
-    def s12(self) -> List[Datapoint]:
+    def s12(self) -> list[Datapoint]:
         return self.s("12")
 
     @s12.setter
-    def s12(self, value: List[Datapoint]):
+    def s12(self, value: list[Datapoint]):
         self.sdata[2] = value
 
     @property
-    def s21(self) -> List[Datapoint]:
+    def s21(self) -> list[Datapoint]:
         return self.s("21")
 
     @s21.setter
-    def s21(self, value: List[Datapoint]):
+    def s21(self, value: list[Datapoint]):
         self.sdata[1] = value
 
     @property
-    def s22(self) -> List[Datapoint]:
+    def s22(self) -> list[Datapoint]:
         return self.s("22")
 
     @s22.setter
-    def s22(self, value: List[Datapoint]):
+    def s22(self, value: list[Datapoint]):
         self.sdata[3] = value
 
     @property
     def r(self) -> int:
         return self.opts.resistance
 
-    def s(self, name: str) -> List[Datapoint]:
+    def s(self, name: str) -> list[Datapoint]:
         return self.sdata[Touchstone.FIELD_ORDER.index(name)]
 
     def s_freq(self, name: str, freq: int) -> Datapoint:
diff --git a/src/NanoVNASaver/Version.py b/src/NanoVNASaver/Version.py
index f6bf3e2..f103d56 100644
--- a/src/NanoVNASaver/Version.py
+++ b/src/NanoVNASaver/Version.py
@@ -17,12 +17,12 @@
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
 import re
+import typing
 
 logger = logging.getLogger(__name__)
 
 
-class Version:
-    RXP = re.compile(
+_RXP = re.compile(
         r"""^
         \D*
         (?P<major>\d+)\.
@@ -33,61 +33,26 @@ class Version:
         re.VERBOSE,
     )
 
-    def __init__(self, vstring: str = "0.0.0"):
-        self.data = {
-            "major": 0,
-            "minor": 0,
-            "revision": 0,
-            "note": "",
-        }
-        try:
-            self.data = Version.RXP.search(vstring).groupdict()
-            for name in ("major", "minor", "revision"):
-                self.data[name] = int(self.data[name])
-        except TypeError:
-            self.data["revision"] = 0
-        except AttributeError:
-            logger.error("Unable to parse version: %s", vstring)
 
-    def __gt__(self, other: "Version") -> bool:
-        left, right = self.data, other.data
-        for name in ("major", "minor", "revision"):
-            if left[name] > right[name]:
-                return True
-            if left[name] < right[name]:
-                return False
-        return False
-
-    def __lt__(self, other: "Version") -> bool:
-        return other.__gt__(self)
-
-    def __ge__(self, other: "Version") -> bool:
-        return self.__gt__(other) or self.__eq__(other)
-
-    def __le__(self, other: "Version") -> bool:
-        return other.__gt__(self) or self.__eq__(other)
-
-    def __eq__(self, other: "Version") -> bool:
-        return self.data == other.data
+class _Version(typing.NamedTuple):
+    major: int
+    minor: int
+    revision: int
+    note: str
 
     def __str__(self) -> str:
         return (
-            f'{self.data["major"]}.{self.data["minor"]}'
-            f'.{self.data["revision"]}{self.data["note"]}'
+            f'{self.major}.{self.minor}'
+            f'.{self.revision}{self.note}'
         )
 
-    @property
-    def major(self) -> int:
-        return self.data["major"]
 
-    @property
-    def minor(self) -> int:
-        return self.data["minor"]
+def Version(vstring: str = "0.0.0") -> '_Version':
+    if (match := _RXP.search(vstring)) is None:
+        logger.error("Unable to parse version: %s", vstring)
+        return _Version(0, 0, 0, '')
 
-    @property
-    def revision(self) -> int:
-        return self.data["revision"]
-
-    @property
-    def note(self) -> str:
-        return self.data["note"]
+    return _Version(int(match.group('major')),
+                    int(match.group('minor')),
+                    int(match.group('revision') or '0'),
+                    match.group('note'))
diff --git a/src/NanoVNASaver/Windows/DisplaySettings.py b/src/NanoVNASaver/Windows/DisplaySettings.py
index 51f4f52..908d430 100644
--- a/src/NanoVNASaver/Windows/DisplaySettings.py
+++ b/src/NanoVNASaver/Windows/DisplaySettings.py
@@ -17,7 +17,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import logging
-from typing import List
 
 from PyQt6 import QtWidgets, QtCore
 from PyQt6.QtGui import QColor, QColorConstants, QPalette, QShortcut
@@ -210,7 +209,7 @@ class DisplaySettingsWindow(QtWidgets.QWidget):
         vswr_marker_box = QtWidgets.QGroupBox("VSWR Markers")
         vswr_marker_layout = QtWidgets.QFormLayout(vswr_marker_box)
 
-        self.vswrMarkers: List[float] = self.app.settings.value(
+        self.vswrMarkers: list[float] = self.app.settings.value(
             "VSWRMarkers", [], float
         )
 
diff --git a/src/NanoVNASaver/__init__.py b/src/NanoVNASaver/__init__.py
index 8c289c0..e8935d1 100644
--- a/src/NanoVNASaver/__init__.py
+++ b/src/NanoVNASaver/__init__.py
@@ -1,13 +1,7 @@
-from importlib.metadata import (
-    PackageNotFoundError,
-    version,
-)
+import importlib.metadata
 
 try:
     # Change here if project is renamed and does not equal the package name
-    dist_name = "nanovna-saver"
-    __version__ = version(dist_name)
-except PackageNotFoundError:  # pragma: no cover
+    __version__ = importlib.metadata.version(distribution_name="nanovna-saver")
+except importlib.metadata.PackageNotFoundError:  # pragma: no cover
     __version__ = "unknown"
-finally:
-    del version, PackageNotFoundError
diff --git a/tests/test_sweep.py b/tests/test_sweep.py
index e4733bb..b6a484c 100644
--- a/tests/test_sweep.py
+++ b/tests/test_sweep.py
@@ -27,8 +27,10 @@ class TestCases(unittest.TestCase):
     def test_sweep(self):
         sweep = Sweep()
         self.assertEqual(str(sweep),
-                         "Sweep(3600000, 30000000, 101, 1, Properties('',"
-                         " SweepMode.SINGLE, (3, 0), False))")
+                         "Sweep(start=3600000, end=30000000, points=101,"
+                         " segments=1, properties=Properties(name='',"
+                         " mode=<SweepMode.SINGLE: 0>, averages=(3, 0),"
+                         " logarithmic=False))")
         self.assertTrue(Sweep(3600000) == sweep)
         self.assertFalse(Sweep(3600001) == sweep)
         self.assertRaises(ValueError, Sweep, -1)