diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7a57bf157..956c10e8f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -350,4 +350,5 @@ You can propose new designs for existing Harbor features. You can also design en
 [dev-slack]: https://cloud-native.slack.com/archives/CC1E0J0MC
 [cncf-slack]: https://slack.cncf.io
 [users-dl]: https://lists.cncf.io/g/harbor-users
-[dev-dl]: https://lists.cncf.io/g/harbor-dev
\ No newline at end of file
+[dev-dl]: https://lists.cncf.io/g/harbor-dev
+[twitter]: http://twitter.com/project_harbor