diff --git a/docs/metadata.rst b/docs/metadata.rst
index dbde87e86..5e37219e1 100644
--- a/docs/metadata.rst
+++ b/docs/metadata.rst
@@ -131,6 +131,8 @@ user interface for the contract.
 Furthermore, Mist can use the userdoc to display a confirmation message to the user
 whenever they interact with the contract.
 
+Additional information about Ethereum Natural Specification (NatSpec) can be found `here <https://github.com/ethereum/wiki/wiki/Ethereum-Natural-Specification-Format>`_. 
+
 Usage for Source Code Verification
 ==================================