diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/WPFToolkit.Extended.csproj b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/WPFToolkit.Extended.csproj
index 7fac01eb..5d20e02d 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/WPFToolkit.Extended.csproj
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/WPFToolkit.Extended.csproj
@@ -41,7 +41,7 @@
     <SignAssembly>true</SignAssembly>
   </PropertyGroup>
   <PropertyGroup>
-    <AssemblyOriginatorKeyFile>sn.pfx</AssemblyOriginatorKeyFile>
+    <AssemblyOriginatorKeyFile>sn.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
@@ -184,7 +184,7 @@
       <LastGenOutput>Settings.Designer.cs</LastGenOutput>
     </None>
     <AppDesigner Include="Properties\" />
-    <None Include="sn.pfx" />
+    <None Include="sn.snk" />
   </ItemGroup>
   <ItemGroup>
     <Resource Include="MessageBox\Icons\Error48.png" />
diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/sn.pfx b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/sn.pfx
deleted file mode 100644
index 0f441ed9..00000000
Binary files a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/sn.pfx and /dev/null differ
diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/sn.snk b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/sn.snk
new file mode 100644
index 00000000..1bdc9120
Binary files /dev/null and b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/sn.snk differ