diff --git a/.github/workflows/release_linux.yml b/.github/workflows/release_linux.yml
index cc4f078..81f2304 100644
--- a/.github/workflows/release_linux.yml
+++ b/.github/workflows/release_linux.yml
@@ -23,9 +23,9 @@ jobs:
       run: |
         python3.9 -m venv build
         . build/bin/activate
-        python -m pip install pip==22.2.2 setuptools==65.3.0
+        python -m pip install pip==22.3.1 setuptools==65.6.3
         pip install -r requirements.txt
-        pip install PyInstaller==5.4.1
+        pip install PyInstaller==5.7.0
     - name: Build binary
       run: |
         . build/bin/activate
diff --git a/.github/workflows/release_linux_modern.yml b/.github/workflows/release_linux_modern.yml
index 483f8d8..5255262 100644
--- a/.github/workflows/release_linux_modern.yml
+++ b/.github/workflows/release_linux_modern.yml
@@ -15,17 +15,18 @@ jobs:
       uses: actions/checkout@v2
     - name: Install python
       run: |
+        sudo add-apt-repository ppa:deadsnakes/ppa
         sudo apt-get update
-        sudo apt install -y python3.10 python3-pip python3.10-venv \
-          python3.10-dev \
+        sudo apt install -y python3.11 python3-pip python3.11-venv \
+          python3.11-dev \
           python3-pyqt5
     - name: Install dependencies and pyinstall
       run: |
-        python3.10 -m venv build
+        python3.11 -m venv build
         . build/bin/activate
-        python -m pip install pip==22.2.2 setuptools==65.3.0
+        python -m pip install pip==22.3.1 setuptools==65.6.3
         pip install -r requirements.txt
-        pip install PyInstaller==5.4.1
+        pip install PyInstaller==5.7.0
     - name: Build binary
       run: |
         . build/bin/activate
diff --git a/.github/workflows/release_macos.yml b/.github/workflows/release_macos.yml
index 1118f9f..7ec1d24 100644
--- a/.github/workflows/release_macos.yml
+++ b/.github/workflows/release_macos.yml
@@ -15,12 +15,12 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: 3.9
+        python-version: 3.11
     - name: Install dependencies and pyinstall
       run: |
-        python -m pip install pip==22.2.2 setuptools==65.3.0
+        python -m pip install pip==22.3.1 setuptools==65.6.3
         pip install -r requirements.txt
-        pip install PyInstaller==5.4.1
+        pip install PyInstaller==5.7.0
     - name: Build binary
       run: |
         pyinstaller --onefile -n nanovna-saver nanovna-saver.py
diff --git a/.github/workflows/release_win.yml b/.github/workflows/release_win.yml
index c0e0356..4221c81 100644
--- a/.github/workflows/release_win.yml
+++ b/.github/workflows/release_win.yml
@@ -18,13 +18,13 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: 3.9
+        python-version: 3.11
         architecture: ${{ matrix.arch }}
     - name: Install dependencies and pyinstall
       run: |
-        python -m pip install pip==22.2.2 setuptools==65.3.0
+        python -m pip install pip==22.3.1 setuptools==65.6.3
         pip install -r requirements.txt
-        pip install PyInstaller==5.4.1
+        pip install PyInstaller==5.7.0
     - name: Build binary
       run: |
         pyinstaller --onefile -n nanovna-saver.exe nanovna-saver.py
diff --git a/NanoVNASaver/Windows/TDR.py b/NanoVNASaver/Windows/TDR.py
index 37bdfc6..1e9f22a 100644
--- a/NanoVNASaver/Windows/TDR.py
+++ b/NanoVNASaver/Windows/TDR.py
@@ -132,7 +132,7 @@ class TDRWindow(QtWidgets.QWidget):
             logger.info("Cannot compute cable length at 0 span")
             return
 
-        s11 = [np.complex(d.re, d.im) for d in self.app.data.s11]
+        s11 = [complex(d.re, d.im) for d in self.app.data.s11]
         window = np.blackman(len(self.app.data.s11))
 
         windowed_s11 = window * s11
diff --git a/requirements.txt b/requirements.txt
index 85a69b3..508a322 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 pyserial==3.5
 PyQt5==5.15.7
-numpy==1.23.5
+numpy==1.24.1
 scipy==1.9.3
 Cython==0.29.32