diff --git a/entrypoint.sh b/entrypoint.sh
index 64d5d5d..fd89018 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -270,7 +270,7 @@ start_web_service() {
     log_info "使用单 Worker 模式（sanguo_api 状态化 orchestrator）"
 
     # 日志级别
-    UVICORN_ARGS="$UVICORN_ARGS --log-level ${VNPY_LOG_LEVEL:-info}"
+    UVICORN_ARGS="$UVICORN_ARGS --log-level ${VNPY_LOG_LEVEL,,}"
 
     # 访问日志
     UVICORN_ARGS="$UVICORN_ARGS --access-log"