diff --git a/src/windows-build.bat b/src/windows-build.bat
index bd75782a..86bb4eb8 100644
--- a/src/windows-build.bat
+++ b/src/windows-build.bat
@@ -8,6 +8,8 @@ del /q /f gam-%1-windows-x64.msi
 del /q /f *.wixobj
 del /q /f *.wixpdb
 
+set WIXVERSION="3.11"
+
 c:\python27-32\scripts\pyinstaller --clean -F --distpath=gam windows-gam.spec
 xcopy LICENSE gam\
 xcopy whatsnew.txt gam\
@@ -24,6 +26,6 @@ xcopy GamCommands.txt gam-64\
 "%ProgramFiles%\7-Zip\7z.exe" a -tzip gam-%1-windows-x64.zip gam-64\ -xr!.svn
 
 set GAMVERSION=%1
-"%ProgramFiles(x86)%\WiX Toolset v3.10\bin\candle.exe" -arch x64 gam.wxs
-"%ProgramFiles(x86)%\WiX Toolset v3.10\bin\light.exe" -ext "%ProgramFiles(x86)%\WiX Toolset v3.10\bin\WixUIExtension.dll" gam.wixobj -o gam-%1-windows-x64.msi
+"%ProgramFiles(x86)%\WiX Toolset v%WIXVERSION%\bin\candle.exe" -arch x64 gam.wxs
+"%ProgramFiles(x86)%\WiX Toolset v%WIXVERSION%\bin\light.exe" -ext "%ProgramFiles(x86)%\WiX Toolset v%WIXVERSION%\bin\WixUIExtension.dll" gam.wixobj -o gam-%1-windows-x64.msi
 del /q /f gam-%1-windows-x64.wixpdb