diff --git a/misc/version.txt b/misc/version.txt
index e1628f3..2379a4c 100644
--- a/misc/version.txt
+++ b/misc/version.txt
@@ -1 +1 @@
-1.6.0.5
\ No newline at end of file
+1.6.0.6
\ No newline at end of file
diff --git a/src/BreCalClient/BreCalClient.csproj b/src/BreCalClient/BreCalClient.csproj
index 3db7ed7..a6dcc3a 100644
--- a/src/BreCalClient/BreCalClient.csproj
+++ b/src/BreCalClient/BreCalClient.csproj
@@ -8,8 +8,8 @@
     <SignAssembly>True</SignAssembly>
     <StartupObject>BreCalClient.App</StartupObject>
     <AssemblyOriginatorKeyFile>..\..\misc\brecal.snk</AssemblyOriginatorKeyFile>
-    <AssemblyVersion>1.6.0.5</AssemblyVersion>
-    <FileVersion>1.6.0.5</FileVersion>
+    <AssemblyVersion>1.6.0.6</AssemblyVersion>
+    <FileVersion>1.6.0.6</FileVersion>
     <Title>Bremen calling client</Title>
     <Description>A Windows WPF client for the Bremen calling API.</Description>
     <ApplicationIcon>containership.ico</ApplicationIcon>
diff --git a/src/BreCalClient/Properties/PublishProfiles/ClickOnceTestProfile.pubxml b/src/BreCalClient/Properties/PublishProfiles/ClickOnceTestProfile.pubxml
index 3d45157..7e092c7 100644
--- a/src/BreCalClient/Properties/PublishProfiles/ClickOnceTestProfile.pubxml
+++ b/src/BreCalClient/Properties/PublishProfiles/ClickOnceTestProfile.pubxml
@@ -4,8 +4,8 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
 -->
 <Project>
   <PropertyGroup>
-    <ApplicationRevision>4</ApplicationRevision>
-    <ApplicationVersion>1.6.0.5</ApplicationVersion>
+    <ApplicationRevision>6</ApplicationRevision>
+    <ApplicationVersion>1.6.0.6</ApplicationVersion>
     <BootstrapperEnabled>True</BootstrapperEnabled>
     <Configuration>Debug</Configuration>
     <CreateDesktopShortcut>True</CreateDesktopShortcut>
@@ -30,7 +30,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <TargetFramework>net6.0-windows</TargetFramework>
     <UpdateEnabled>True</UpdateEnabled>
     <UpdateMode>Foreground</UpdateMode>
-    <UpdateRequired>False</UpdateRequired>
+    <UpdateRequired>True</UpdateRequired>
     <WebPageFileName>Publish.html</WebPageFileName>
     <CreateDesktopShortcut>True</CreateDesktopShortcut>
     <ErrorReportUrl>https://www.bsmd-emswe.eu/</ErrorReportUrl>
@@ -41,6 +41,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <PublishDir>bin\Debug\net6.0-windows\win-x64\app.publish\</PublishDir>
     <RuntimeIdentifier>win-x64</RuntimeIdentifier>
     <SkipPublishVerification>false</SkipPublishVerification>
+    <MinimumRequiredVersion>1.6.0.6</MinimumRequiredVersion>
   </PropertyGroup>
   <ItemGroup>
     <PublishFile Include="containership.ico">