diff --git a/AUTHORS.md b/AUTHORS.md
index 15f9254..8bc08bd 100644
--- a/AUTHORS.md
+++ b/AUTHORS.md
@@ -1,10 +1,10 @@
 # Core Developer #
 
 ----------
-- Sepand Haghighi - Sharif University Of Technology/Moduland Co - [@sepandhaghighi](http://github.com/sepandhaghighi)
-- Sadra Sabouri - Sharif University Of Technology - [@sadrasabouri](https://github.com/sadrasabouri)
+- Sepand Haghighi - Sharif University of Technology - [@sepandhaghighi](http://github.com/sepandhaghighi)
+- Sadra Sabouri - Sharif University of Technology - [@sadrasabouri](https://github.com/sadrasabouri)
 
 # Other Contributors #
-- Mohammad Hosein Moslemi - Sharif University Of Technology - [@mhmoslemi2338](https://github.com/mhmoslemi2338)
+- Mohammad Hosein Moslemi - [@mhmoslemi2338](https://github.com/mhmoslemi2338)
 - Evan Slack - [@evanofslack](https://github.com/evanofslack)
 ----------
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e9a540c..a285a80 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,11 +7,12 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ## [Unreleased]
 ### Added
 - `__del__` method
-- `alpha` attribute
 - Demo notebook
 ### Changed
 - `depth` parameter added to `nft_storage` method
 - `depth` parameter added to `save_fig_buf` function
+- `alpha` parameter added to `plot` method
+- `alpha` parameter added to `plot_params_filter` function
 - Random mode modified
 - `README.md` updated
 ## [0.4] - 2022-01-13
diff --git a/samila/functions.py b/samila/functions.py
index c28ab18..480a36e 100644
--- a/samila/functions.py
+++ b/samila/functions.py
@@ -164,7 +164,7 @@ def plot_params_filter(
     :type size: tuple
     :param projection: projection type
     :type projection: str
-    :param alpha: point alpha
+    :param alpha: point transparency
     :type alpha: float
     :return: None
     """
@@ -308,7 +308,8 @@ def save_data_file(g, file_adr):
         "color": g.color,
         "bgcolor": g.bgcolor,
         "spot_size": g.spot_size,
-        "projection": g.projection
+        "projection": g.projection,
+        "alpha": g.alpha
     }
     data['matplotlib_version'] = matplotlib_version
     result = {"status": True, "message": DATA_SAVE_SUCCESS_MESSAGE}
@@ -347,7 +348,8 @@ def save_config_file(g, file_adr):
         "color": g.color,
         "bgcolor": g.bgcolor,
         "spot_size": g.spot_size,
-        "projection": g.projection
+        "projection": g.projection,
+        "alpha": g.alpha
     }
     data['matplotlib_version'] = matplotlib_version
     result = {"status": True, "message": DATA_SAVE_SUCCESS_MESSAGE}
@@ -378,7 +380,7 @@ def save_fig_file(figure, file_adr, depth):
     try:
         figure.savefig(
             file_adr,
-            dpi=depth*figure.dpi,
+            dpi=depth * figure.dpi,
             facecolor=figure.get_facecolor(),
             edgecolor='none')
         return result
@@ -408,7 +410,7 @@ def save_fig_buf(figure, depth):
         buf = io.BytesIO()
         figure.savefig(
             buf,
-            dpi=depth*figure.dpi,
+            dpi=depth * figure.dpi,
             format='png',
             facecolor=figure.get_facecolor(),
             edgecolor='none')
@@ -468,6 +470,7 @@ def load_data(g, data):
             g.bgcolor = plot_config.get("bgcolor", DEFAULT_BACKGROUND_COLOR)
             g.spot_size = plot_config.get("spot_size", DEFAULT_SPOT_SIZE)
             g.projection = plot_config.get("projection", DEFAULT_PROJECTION)
+            g.alpha = plot_config.get("alpha", DEFAULT_ALPHA)
         return
     raise samilaDataError(DATA_TYPE_ERROR)
 
@@ -500,5 +503,6 @@ def load_config(g, config):
             g.bgcolor = plot_config.get("bgcolor", DEFAULT_BACKGROUND_COLOR)
             g.spot_size = plot_config.get("spot_size", DEFAULT_SPOT_SIZE)
             g.projection = plot_config.get("projection", DEFAULT_PROJECTION)
+            g.alpha = plot_config.get("alpha", DEFAULT_ALPHA)
         return
     raise samilaConfigError(CONFIG_TYPE_ERROR)
diff --git a/samila/genimage.py b/samila/genimage.py
index b35a69b..1d92d44 100644
--- a/samila/genimage.py
+++ b/samila/genimage.py
@@ -106,9 +106,18 @@ class GenerativeImage:
         :type size: tuple
         :param projection: projection type
         :type projection: str
+        :param alpha: point transparency
+        :type alpha: float
         :return: None
         """
-        plot_params_filter(self, color, bgcolor, spot_size, size, projection, alpha)
+        plot_params_filter(
+            self,
+            color,
+            bgcolor,
+            spot_size,
+            size,
+            projection,
+            alpha)
         fig = plt.figure()
         fig.set_size_inches(self.size[0], self.size[1])
         fig.set_facecolor(self.bgcolor)
diff --git a/test/overall_test.py b/test/overall_test.py
index 337361d..23fdbf9 100644
--- a/test/overall_test.py
+++ b/test/overall_test.py
@@ -161,6 +161,9 @@ False
 [0]
 >>> g.data2
 [1]
+>>> g_ = GenerativeImage()
+>>> del(g)
+>>> del(g_)
 >>> os.remove("test.png")
 >>> os.remove("test2.png")
 >>> os.remove("data.json")