diff --git a/.ci/build_packages/Dockerfile b/.ci/build_packages/Dockerfile
index b56cb5220..e979adfb3 100644
--- a/.ci/build_packages/Dockerfile
+++ b/.ci/build_packages/Dockerfile
@@ -1,4 +1,5 @@
 ARG BUILD_FROM=emqx/build-env:erl23.3.4.9-3-ubuntu20.04
+# This Dockerfile is only used for EMQX 4.3, no need to update for 4.4 or later
 FROM ${BUILD_FROM}
 
 ARG EMQX_NAME=emqx