diff --git a/WinRT.Runtime/WinRT.Runtime.csproj b/WinRT.Runtime/WinRT.Runtime.csproj
index d28514b9f..362021334 100644
--- a/WinRT.Runtime/WinRT.Runtime.csproj
+++ b/WinRT.Runtime/WinRT.Runtime.csproj
@@ -25,6 +25,8 @@
     <Description>C#/WinRT Runtime v$(VersionString)</Description>
     <AssemblyTitle>C#/WinRT Runtime v$(VersionString)</AssemblyTitle>
     <Copyright>Copyright (c) Microsoft Corporation. All rights reserved.</Copyright>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>key.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
     
   <ItemGroup>
diff --git a/WinRT.Runtime/key.snk b/WinRT.Runtime/key.snk
new file mode 100644
index 000000000..e5e1a12bb
Binary files /dev/null and b/WinRT.Runtime/key.snk differ