diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8bb9f34..82378bb 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -6,6 +6,8 @@ This document describes how to contribute an app to CasaOS AppStore.
 
 **NOTE**: The legacy `appfile.json` is no longer supported since CasaOS v0.4.4. There is no need to include this file in your PR.
 
+**NOTE**: Do not use `latest` tag for `image`. [What's Wrong With The Docker `:latest` Tag?](https://github.com/IceWhaleTech/CasaOS-AppStore/issues/167)
+
 ## Submit Process
 
 App submission should be done via Pull Request. Fork this repository and prepare the app per guidelines below.