diff --git a/source/key.snk b/source/key.snk
new file mode 100644
index 0000000..67c9bb0
Binary files /dev/null and b/source/key.snk differ
diff --git a/source/nanoFramework.Networking.Sntp.nfproj b/source/nanoFramework.Networking.Sntp.nfproj
index 67367c5..c9ef432 100644
--- a/source/nanoFramework.Networking.Sntp.nfproj
+++ b/source/nanoFramework.Networking.Sntp.nfproj
@@ -18,6 +18,15 @@
     <NF_IsCoreLibrary>True</NF_IsCoreLibrary>
     <DocumentationFile>bin\$(Configuration)\nanoFramework.Networking.Sntp.xml</DocumentationFile>
   </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>key.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
+  <PropertyGroup>
+    <DelaySign>false</DelaySign>
+  </PropertyGroup>  
   <PropertyGroup Label="nanoFramework">
     <!-- generate PE: TRUE -->
     <NFMDP_PE_SKIP>false</NFMDP_PE_SKIP>