diff --git a/external/Java.Interop b/external/Java.Interop
index 281b5d9b429..73eaddc949e 160000
--- a/external/Java.Interop
+++ b/external/Java.Interop
@@ -1 +1 @@
-Subproject commit 281b5d9b42921a7caa0e48b591355aba0047da1d
+Subproject commit 73eaddc949e85e18821b1ebb54b81995dfcdcfc9
diff --git a/product.snk b/product.snk
new file mode 100644
index 00000000000..8c04e53be9d
Binary files /dev/null and b/product.snk differ
diff --git a/src/Mono.Android.Export/Mono.Android.Export.csproj b/src/Mono.Android.Export/Mono.Android.Export.csproj
index 15134198c7d..2b4d13e8587 100644
--- a/src/Mono.Android.Export/Mono.Android.Export.csproj
+++ b/src/Mono.Android.Export/Mono.Android.Export.csproj
@@ -8,6 +8,8 @@
     <RootNamespace>Mono.Android.Export</RootNamespace>
     <AssemblyName>Mono.Android.Export</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\..\product.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <Import Project="..\..\Configuration.props" />
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/src/Mono.Android/Mono.Android.csproj b/src/Mono.Android/Mono.Android.csproj
index 3db622ac1b0..c08d17293eb 100644
--- a/src/Mono.Android/Mono.Android.csproj
+++ b/src/Mono.Android/Mono.Android.csproj
@@ -8,6 +8,8 @@
     <RootNamespace>Android</RootNamespace>
     <AssemblyName>Mono.Android</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\..\product.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <Import Project="..\..\Configuration.props" />
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/src/Xamarin.Android.NUnitLite/Xamarin.Android.NUnitLite.csproj b/src/Xamarin.Android.NUnitLite/Xamarin.Android.NUnitLite.csproj
index 37c6427bae7..c2edaf0904a 100644
--- a/src/Xamarin.Android.NUnitLite/Xamarin.Android.NUnitLite.csproj
+++ b/src/Xamarin.Android.NUnitLite/Xamarin.Android.NUnitLite.csproj
@@ -11,6 +11,8 @@
     <MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
     <AssemblyName>Xamarin.Android.NUnitLite</AssemblyName>
     <AndroidResgenFile>Resources\Resource.designer.cs</AndroidResgenFile>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\..\product.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <Import Project="..\..\Configuration.props" />
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">