diff --git a/app.py b/app.py
index d835af1..e2ffa71 100755
--- a/app.py
+++ b/app.py
@@ -29,4 +29,4 @@ def logall(body, logger):
 
 # 启动slack监听
 if __name__ == "__main__":
-    app.start(os.environ.get("PORT", 3000))
+    app.start(int(os.environ.get("PORT", 3000)))