diff --git a/csharp/keys/README.md b/csharp/keys/README.md
index f6f27e80..ede67357 100644
--- a/csharp/keys/README.md
+++ b/csharp/keys/README.md
@@ -5,5 +5,5 @@ Contents
   Public key to verify strong name of Google.Protobuf assemblies.
 - Google.Protobuf.snk:
   Signing key to provide strong name of Google.Protobuf assemblies.
-  As per https://msdn.microsoft.com/en-us/library/wd40t7ad(v=vs.110).aspx
-  signing key should be checked into the repository.
\ No newline at end of file
+  As per [Microsoft guidance](https://msdn.microsoft.com/en-us/library/wd40t7ad(v=vs.110).aspx)
+  signing key should be checked into the repository.