diff --git a/docker/.env.example b/docker/.env.example
index 437c1199f1..2fe63c1d8f 100644
--- a/docker/.env.example
+++ b/docker/.env.example
@@ -40,14 +40,16 @@ APP_WEB_URL=
 # used to display File preview or download Url to the front-end or as Multi-model inputs;
 # Url is signed and has expiration time.
 #
+# Setting FILES_URL is required for file processing plugins.
+#
 # Set FILES_URL based on how you access the Dify server:
 #   - For https://example.com, use FILES_URL=https://example.com
 #   - For http://example.com, use FILES_URL=http://example.com
 #
-# Recommendation: configure a dedicated domain (e.g., https://upload.example.com).
+# Recommendation: use a dedicated domain (e.g., https://upload.example.com).
 #
 # Alternatively, use http://<your-ip>:5001 or http://api:5001,
-# ensuring that port 5001 is externally accessible (see docker-compose.yaml).
+# ensuring port 5001 is externally accessible (see docker-compose.yaml).
 FILES_URL=
 
 # ------------------------------