diff --git a/docker/.env.example b/docker/.env.example
index 516fb19b66..906bb42336 100644
--- a/docker/.env.example
+++ b/docker/.env.example
@@ -45,7 +45,7 @@ APP_WEB_URL=
 #   Recommendation: use a dedicated domain (e.g., https://upload.example.com).
 #   Alternatively, use http://<your-ip>:5001 or http://api:5001,
 #   ensuring port 5001 is externally accessible (see docker-compose.yaml).
-FILES_URL=
+FILES_URL=http://api:5001
 
 # INTERNAL_FILES_URL is used for plugin daemon communication within Docker network.
 # Set this to the internal Docker service URL for proper plugin file access.
diff --git a/docker/docker-compose.yaml b/docker/docker-compose.yaml
index c97699c4c9..ce416a8cad 100644
--- a/docker/docker-compose.yaml
+++ b/docker/docker-compose.yaml
@@ -10,7 +10,7 @@ x-shared-env: &shared-api-worker-env
   SERVICE_API_URL: ${SERVICE_API_URL:-}
   APP_API_URL: ${APP_API_URL:-}
   APP_WEB_URL: ${APP_WEB_URL:-}
-  FILES_URL: ${FILES_URL:-}
+  FILES_URL: ${FILES_URL:-http://api:5001}
   INTERNAL_FILES_URL: ${INTERNAL_FILES_URL:-}
   LANG: ${LANG:-en_US.UTF-8}
   LC_ALL: ${LC_ALL:-en_US.UTF-8}