diff --git a/is_offline_api.py b/is_offline_api.py
index f4252f8..2d23234 100644
--- a/is_offline_api.py
+++ b/is_offline_api.py
@@ -47,5 +47,5 @@ if __name__ == "__main__":
     # 支持通过环境变量覆盖监听地址和端口
     import os
     host = os.getenv("HOST", "0.0.0.0")
-    port = int(os.getenv("PORT", "5100"))
+    port = 5100
     app.run(host=host, port=port, debug=False)