diff --git a/Contributing-Code.md b/Contributing-Code.md
index 0aa5278..fc75761 100644
--- a/Contributing-Code.md
+++ b/Contributing-Code.md
@@ -4,6 +4,8 @@ If you have/find any concern/problem with this document, **DO NOT** create an is
 
 ### Before You Start
 
+Please agree to the [CLA agreement](https://gist.github.com/Unknwon/44ef49b2e24b3755cd0438a77b103733) of Gogs project. If you do not agree, please don't send pull requests.
+
 ##### Those We Do Accept
 
 1. Typos in template files or code comments.
@@ -35,4 +37,5 @@ Write a comment to the corresponding thread to claim you're working on it, so pe
 ### Final Checks
 
 1. Currently, **ALL** pull requests must be sent to `develop` branch.
-2. Code review is **VERY** strict, please be prepared for benefiting future of this project.
+2. Sign the CLA agreement.
+3. Code review is **VERY** strict, please be prepared for benefiting future of this project.