diff --git a/docker-compose.yml b/docker-compose.yml
index c45de5c..29cb5fa 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -70,6 +70,7 @@ services:
       - CORS_ORIGIN=${CORS_ORIGIN}
 
       # ── 数据库 & 缓存 ──
+      - DATA_DIR=/data
       - DB_PATH=${DB_PATH:-/data/database.sqlite}
       - REDIS_URL=${REDIS_URL:-redis://redis:6379}