diff --git a/Source/GtkSharp.snk b/Source/GtkSharp.snk
new file mode 100644
index 000000000..977706852
Binary files /dev/null and b/Source/GtkSharp.snk differ
diff --git a/Source/Libs/AtkSharp/AtkSharp.csproj b/Source/Libs/AtkSharp/AtkSharp.csproj
index d8f39de67..ef60b1982 100644
--- a/Source/Libs/AtkSharp/AtkSharp.csproj
+++ b/Source/Libs/AtkSharp/AtkSharp.csproj
@@ -7,6 +7,8 @@
     <RepositoryUrl>https://github.com/GtkSharp/GtkSharp</RepositoryUrl>
     <Description>AtkSharp is a C# wrapper for the Atk library.</Description>
     <PackageTags>atk;atksharp;atk-sharp;wrapper</PackageTags>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\..\GtkSharp.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
     <OutputPath>..\..\..\BuildOutput\Debug</OutputPath>
diff --git a/Source/Libs/CairoSharp/CairoSharp.csproj b/Source/Libs/CairoSharp/CairoSharp.csproj
index bbc9e0ec4..7e6daa34b 100644
--- a/Source/Libs/CairoSharp/CairoSharp.csproj
+++ b/Source/Libs/CairoSharp/CairoSharp.csproj
@@ -7,6 +7,8 @@
     <RepositoryUrl>https://github.com/GtkSharp/GtkSharp</RepositoryUrl>
     <Description>CairoSharp is a C# wrapper for the Cairo library.</Description>
     <PackageTags>cairo;cairosharp;cairo-sharp;wrapper</PackageTags>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\..\GtkSharp.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
     <OutputPath>..\..\..\BuildOutput\Debug</OutputPath>
diff --git a/Source/Libs/GLibSharp/GLibSharp.csproj b/Source/Libs/GLibSharp/GLibSharp.csproj
index 9461e9422..d4309c770 100644
--- a/Source/Libs/GLibSharp/GLibSharp.csproj
+++ b/Source/Libs/GLibSharp/GLibSharp.csproj
@@ -7,6 +7,8 @@
     <RepositoryUrl>https://github.com/GtkSharp/GtkSharp</RepositoryUrl>
     <Description>GLibSharp is a C# wrapper for the GLib library.</Description>
     <PackageTags>glib;glibsharp;glib-sharp;wrapper</PackageTags>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\..\GtkSharp.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
     <OutputPath>..\..\..\BuildOutput\Debug</OutputPath>
diff --git a/Source/Libs/GdkSharp/GdkSharp.csproj b/Source/Libs/GdkSharp/GdkSharp.csproj
index d04f1ce00..dbdd4ecb8 100644
--- a/Source/Libs/GdkSharp/GdkSharp.csproj
+++ b/Source/Libs/GdkSharp/GdkSharp.csproj
@@ -7,6 +7,8 @@
     <RepositoryUrl>https://github.com/GtkSharp/GtkSharp</RepositoryUrl>
     <Description>GdkSharp is a C# wrapper for the Gdk library.</Description>
     <PackageTags>gdk;gdksharp;gdk-sharp;wrapper</PackageTags>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\..\GtkSharp.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
     <OutputPath>..\..\..\BuildOutput\Debug</OutputPath>
diff --git a/Source/Libs/GioSharp/GioSharp.csproj b/Source/Libs/GioSharp/GioSharp.csproj
index bdccbd34b..37083e87d 100644
--- a/Source/Libs/GioSharp/GioSharp.csproj
+++ b/Source/Libs/GioSharp/GioSharp.csproj
@@ -7,6 +7,8 @@
     <RepositoryUrl>https://github.com/GtkSharp/GtkSharp</RepositoryUrl>
     <Description>GioSharp is a C# wrapper for the Gio library.</Description>
     <PackageTags>gio;giosharp;gio-sharp;wrapper</PackageTags>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\..\GtkSharp.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
     <OutputPath>..\..\..\BuildOutput\Debug</OutputPath>
diff --git a/Source/Libs/GtkSharp/GtkSharp.csproj b/Source/Libs/GtkSharp/GtkSharp.csproj
index bcb3f4097..432a9e142 100644
--- a/Source/Libs/GtkSharp/GtkSharp.csproj
+++ b/Source/Libs/GtkSharp/GtkSharp.csproj
@@ -9,6 +9,8 @@
     <RepositoryUrl>https://github.com/GtkSharp/GtkSharp</RepositoryUrl>
     <Description>GtkSharp is a C# wrapper for the Gtk library.</Description>
     <PackageTags>gtk;gtksharp;gtk-sharp;wrapper</PackageTags>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\..\GtkSharp.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
 
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
diff --git a/Source/Libs/PangoSharp/PangoSharp.csproj b/Source/Libs/PangoSharp/PangoSharp.csproj
index fc0c831dd..aa3567f94 100644
--- a/Source/Libs/PangoSharp/PangoSharp.csproj
+++ b/Source/Libs/PangoSharp/PangoSharp.csproj
@@ -7,6 +7,8 @@
     <RepositoryUrl>https://github.com/GtkSharp/GtkSharp</RepositoryUrl>
     <Description>PangoSharp is a C# wrapper for the Pango library.</Description>
     <PackageTags>pango;pangosharp;pango-sharp;wrapper</PackageTags>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\..\GtkSharp.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
     <OutputPath>..\..\..\BuildOutput\Debug</OutputPath>