diff --git a/docker/.env.example b/docker/.env.example
index f4cec532443827..be8d72339fe9f1 100644
--- a/docker/.env.example
+++ b/docker/.env.example
@@ -75,7 +75,8 @@ SECRET_KEY=sk-9f73s3ljTXVcMT3Blb3ljTqtsKiGHXVcMT3BlbkFJLK7U
 
 # Password for admin user initialization.
 # If left unset, admin user will not be prompted for a password
-# when creating the initial admin account.
+# when creating the initial admin account. 
+# The length of the password cannot exceed 30 charactors.
 INIT_PASSWORD=
 
 # Deployment environment.