diff --git a/MtApi5Installer/MtApi5Installer.wixproj b/MtApi5Installer/MtApi5Installer.wixproj
index 1fe4bc21..dcab22f0 100755
--- a/MtApi5Installer/MtApi5Installer.wixproj
+++ b/MtApi5Installer/MtApi5Installer.wixproj
@@ -10,6 +10,7 @@
     <OutputType>Package</OutputType>
     <WixTargetsPath Condition=" '$(WixTargetsPath)' == '' AND '$(MSBuildExtensionsPath32)' != '' ">$(MSBuildExtensionsPath32)\Microsoft\WiX\v3.x\Wix.targets</WixTargetsPath>
     <WixTargetsPath Condition=" '$(WixTargetsPath)' == '' ">$(MSBuildExtensionsPath)\Microsoft\WiX\v3.x\Wix.targets</WixTargetsPath>
+    <RunWixToolsOutOfProc>true</RunWixToolsOutOfProc>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' ">
     <OutputPath>..\build\installers\$(Configuration)\</OutputPath>