diff --git a/README.md b/README.md
index e5d4b260..dd88ebbb 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 Persepolis Download Manager 
 =============
-+ version : 2.3 Alpha
++ version : 2.3
 + Persepolis Download Manager is a GUI for aria2.
 + Persepolis written in PYQT5.
 
@@ -156,6 +156,10 @@ Persepolis website developer : **Sadegh Alirezaie**
 https://github.com/Alirezaies
 alirezaie.sadegh@gmail.com
 
+Chrome/Chromium Integration : **Jafar Akhondali**
+https://github.com/JafarAkhondali
+jafar.akhondali@yahoo.com
+
 Persepolis website :
 https://persepolisdm.github.io/
 
diff --git a/files/about.py b/files/about.py
index 8fb14fef..aa379d96 100644
--- a/files/about.py
+++ b/files/about.py
@@ -107,8 +107,8 @@ def __init__(self,persepolis_setting):
 
         self.setWindowTitle( "About Persepolis")
         self.title_label.setText( "Persepolis Download Manager")
-        self.version_label.setText( "Version 2.3 Alpha")
-        self.name_label.setText( "\nAliReza AmirSamimi\nMohammadreza Abdollahzadeh\nSadegh Alirezaie\nMostafa Asadi\nMohammadAmin Vahedinia")
+        self.version_label.setText( "Version 2.3")
+        self.name_label.setText( "\nAliReza AmirSamimi\nMohammadreza Abdollahzadeh\nSadegh Alirezaie\nMostafa Asadi\nMohammadAmin Vahedinia\nJafar Akhondali")
         self.site2_label.setText("<a href=https://persepolisdm.github.io>https://persepolisdm.github.io</a>" )
         self.telegram_label.setText( "<a href=https://telegram.me/persepolisdm>https://telegram.me/persepolisdm</a>" )
         self.twitter_label.setText("<a href=https://twitter.com/persepolisdm>https://twitter.com/persepolisdm</a>")
diff --git a/files/initialization.py b/files/initialization.py
index d05cd794..1c94e27d 100644
--- a/files/initialization.py
+++ b/files/initialization.py
@@ -137,19 +137,9 @@
 f.close()
 
 #compatibility
-version_file = config_folder + '/' + 'version'
-osCommands.touch(version_file)
-f = Open(version_file)
-version_file_line = f.readline()
-f.close()
-
-persepolis_version = version_file_line.strip()
-
-if persepolis_version != '2.3 Alpha':
+persepolis_version =  float(persepolis_setting.value('version/version' , 2.2 ))
+if persepolis_version != 2.3:
     compatibility()
-    persepolis_version = '2.3 Alpha'
-    f = Open(version_file , 'w')
-    f.writelines(persepolis_version)
-    f.close()
-    
+    persepolis_setting.setValue('version/version' , 2.3 ) 
+    persepolis_setting.sync()
 
diff --git a/files/mainwindow.py b/files/mainwindow.py
index ef97855b..624deeff 100644
--- a/files/mainwindow.py
+++ b/files/mainwindow.py
@@ -431,8 +431,8 @@ def run(self):
                     sleep(0.5) 
              
             j = j + 1
-#every 30 seconds
-            if j == 30 or aria2_disconnected == 1 : 
+#every 39 seconds
+            if j == 39 or aria2_disconnected == 1 : 
                 j = 0
                 aria2_disconnected = 0
                 answer = download.aria2Version() #checking aria2 availability by aria2Version function
diff --git a/files/persepolis b/files/persepolis
index 2ed14c57..0a080be1 100755
--- a/files/persepolis
+++ b/files/persepolis
@@ -114,7 +114,7 @@ parser.add_argument('--name',action='store',nargs = 1 , help='The  file  name  o
 parser.add_argument('--default',action='store_true',help='restore default setting' )
 parser.add_argument('--clear',action='store_true',help='Clear download list and user setting!' )
 parser.add_argument('--tray',action='store_true',help="Persepolis is starting in tray icon. It's useful when you want to put persepolis in system's startup." )
-parser.add_argument('--version', action='version', version='Persepolis Download Manager 2.3 Alpha ')
+parser.add_argument('--version', action='version', version='Persepolis Download Manager 2.3')
 args = parser.parse_args()
 
 #Mozilla firefox flashgot will send download information whith terminal arguments(link , referer , cookie , agent , headers , name )
diff --git a/persepolis.1.gz b/persepolis.1.gz
index 766bf9c0..fc6b31e2 100644
Binary files a/persepolis.1.gz and b/persepolis.1.gz differ