diff --git a/build/Build.bat b/build/Build.bat
index b3acc5e7da..432faae9b9 100644
--- a/build/Build.bat
+++ b/build/Build.bat
@@ -5,6 +5,8 @@ SET version=%release%
 
 IF [%comment%] EQU [] (SET version=%release%) ELSE (SET version=%release%-%comment%)
 
+ReplaceIISExpressPortNumber.exe ..\src\Umbraco.Web.UI\Umbraco.Web.UI.csproj %release%
+
 %windir%\Microsoft.NET\Framework\v4.0.30319\msbuild.exe "Build.proj" /p:BUILD_RELEASE=%release% /p:BUILD_COMMENT=%comment%
 
 echo This file is only here so that the containing folder will be included in the NuGet package, it is safe to delete. > .\_BuildOutput\WebApp\App_Code\dummy.txt
diff --git a/build/ReplaceIISExpressPortNumber.exe b/build/ReplaceIISExpressPortNumber.exe
new file mode 100644
index 0000000000..04334ebffe
Binary files /dev/null and b/build/ReplaceIISExpressPortNumber.exe differ
diff --git a/src/Umbraco.Web.UI/Umbraco.Web.UI.csproj b/src/Umbraco.Web.UI/Umbraco.Web.UI.csproj
index de66d4479c..fde7f67246 100644
--- a/src/Umbraco.Web.UI/Umbraco.Web.UI.csproj
+++ b/src/Umbraco.Web.UI/Umbraco.Web.UI.csproj
@@ -2408,9 +2408,9 @@ xcopy "$(ProjectDir)"..\packages\SqlServerCE.4.0.0.0\x86\*.* "$(TargetDir)x86\"
         <WebProjectProperties>
           <UseIIS>True</UseIIS>
           <AutoAssignPort>True</AutoAssignPort>
-          <DevelopmentServerPort>61637</DevelopmentServerPort>
+          <DevelopmentServerPort>6070</DevelopmentServerPort>
           <DevelopmentServerVPath>/</DevelopmentServerVPath>
-          <IISUrl>http://localhost:61639/</IISUrl>
+          <IISUrl>http://localhost:6070</IISUrl>
           <NTLMAuthentication>False</NTLMAuthentication>
           <UseCustomServer>False</UseCustomServer>
           <CustomServerUrl>