diff --git a/app.py b/app.py
index 9c0c5c0..ab87fe0 100644
--- a/app.py
+++ b/app.py
@@ -63,7 +63,7 @@ def worker(id,source,region=None,stream=False):
     else:
         region = int(region)
     print("start loading model...",id,source,region)
-    model = YOLO('best.pt')
+    model = YOLO('best640.pt')
     print("start loaded  model!!!")
     balls = {}
     count = 0
diff --git a/best.pt b/best640.pt
similarity index 100%
rename from best.pt
rename to best640.pt