diff --git a/wix/Moonlight/Moonlight.wixproj b/wix/Moonlight/Moonlight.wixproj
index 1bf54ec9..db5a800a 100644
--- a/wix/Moonlight/Moonlight.wixproj
+++ b/wix/Moonlight/Moonlight.wixproj
@@ -1,4 +1,4 @@
-<Project Sdk="WixToolset.Sdk/4.0.2" ToolsVersion="4.0">
+<Project Sdk="WixToolset.Sdk/4.0.4" ToolsVersion="4.0">
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
     <DefineConstants>Debug</DefineConstants>
   </PropertyGroup>
@@ -27,8 +27,8 @@
     <Exec Command='signtool.exe $(SIGNTOOL_PARAMS) %(SignMsi.FullPath)' />
   </Target>
   <ItemGroup>
-    <PackageReference Include="WixToolset.Firewall.wixext" Version="4.0.2" />
-    <PackageReference Include="WixToolset.Util.wixext" Version="4.0.2" />
-    <PackageReference Include="WixToolset.Heat" Version="4.0.2" />
+    <PackageReference Include="WixToolset.Firewall.wixext" Version="4.0.4" />
+    <PackageReference Include="WixToolset.Util.wixext" Version="4.0.4" />
+    <PackageReference Include="WixToolset.Heat" Version="4.0.4" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/wix/MoonlightSetup/MoonlightSetup.wixproj b/wix/MoonlightSetup/MoonlightSetup.wixproj
index 64624852..d90eaa77 100644
--- a/wix/MoonlightSetup/MoonlightSetup.wixproj
+++ b/wix/MoonlightSetup/MoonlightSetup.wixproj
@@ -1,4 +1,4 @@
-<Project Sdk="WixToolset.Sdk/4.0.2">
+<Project Sdk="WixToolset.Sdk/4.0.4">
   <PropertyGroup>
     <OutputType>Bundle</OutputType>
   </PropertyGroup>
@@ -19,7 +19,7 @@
     <Exec Command='signtool.exe $(SIGNTOOL_PARAMS) %(SignBundle.FullPath)' />
   </Target>
   <ItemGroup>
-    <PackageReference Include="WixToolset.Bal.wixext" Version="4.0.2" />
-    <PackageReference Include="WixToolset.Util.wixext" Version="4.0.2" />
+    <PackageReference Include="WixToolset.Bal.wixext" Version="4.0.4" />
+    <PackageReference Include="WixToolset.Util.wixext" Version="4.0.4" />
   </ItemGroup>
 </Project>
\ No newline at end of file