diff --git a/script/local.py b/script/local.py
index 4221284..facde69 100644
--- a/script/local.py
+++ b/script/local.py
@@ -55,12 +55,12 @@ class RobotModbus(DeviceBase):
             self.cancel_request()
         return ret
     
-    def request():
+    def request(self):
         robot_req.write(1)
         while robot_ack.read() == 0:
             time.sleep(0.01)
 
-    def cancel_request():
+    def cancel_request(self):
         robot_req.write(0)
         while robot_ack.read() == 1:
             time.sleep(0.01)