diff --git a/installer/setup.iss b/installer/setup.iss
index 0f48a530..cc75f5a5 100644
--- a/installer/setup.iss
+++ b/installer/setup.iss
@@ -2,7 +2,7 @@
 ; Erfordert Inno Setup 6.x (https://jrsoftware.org/isinfo.php)
 
 #define MyAppName "Starface Outlook Sync"
-#define MyAppVersion "0.0.0.30"
+#define MyAppVersion "0.0.3.1"
 #define MyAppPublisher "HackerSoft - Hacker-Net Telekommunikation"
 #define MyAppURL "https://www.hacker-net.de"
 #define MyAppExeName "StarfaceOutlookSync.exe"
diff --git a/src/StarfaceOutlookSync/StarfaceOutlookSync.csproj b/src/StarfaceOutlookSync/StarfaceOutlookSync.csproj
index 2bca91e3..74c900a7 100644
--- a/src/StarfaceOutlookSync/StarfaceOutlookSync.csproj
+++ b/src/StarfaceOutlookSync/StarfaceOutlookSync.csproj
@@ -7,9 +7,9 @@
     <AssemblyTitle>Starface Outlook Sync</AssemblyTitle>
     <Company>HackerSoft - Hacker-Net Telekommunikation</Company>
     <Product>Starface Outlook Sync</Product>
-    <Version>0.0.0.30</Version>
-    <AssemblyVersion>0.0.0.30</AssemblyVersion>
-    <FileVersion>0.0.0.30</FileVersion>
+    <Version>0.0.3.1</Version>
+    <AssemblyVersion>0.0.3.1</AssemblyVersion>
+    <FileVersion>0.0.3.1</FileVersion>
     <Description>Synchronisiert Outlook-Kontakte mit Starface Telefonanlage</Description>
     <Copyright>Stefan Hacker - HackerSoft</Copyright>
     <RuntimeIdentifier>win-x64</RuntimeIdentifier>
diff --git a/src/StarfaceOutlookSync/UI/AboutForm.cs b/src/StarfaceOutlookSync/UI/AboutForm.cs
index c006e68f..18d3ddf8 100644
--- a/src/StarfaceOutlookSync/UI/AboutForm.cs
+++ b/src/StarfaceOutlookSync/UI/AboutForm.cs
@@ -27,7 +27,7 @@ namespace StarfaceOutlookSync.UI
 
             var lblVersion = new Label
             {
-                Text = "Version 0.0.0.30",
+                Text = "Version 0.0.3.1",
                 Left = 0, Top = 56, Width = 340, Height = 20,
                 TextAlign = ContentAlignment.MiddleCenter,
                 ForeColor = Color.Gray