diff --git a/src/sender.py b/src/sender.py
index 5fdb9b4..9b56e54 100644
--- a/src/sender.py
+++ b/src/sender.py
@@ -39,5 +39,5 @@ def send_message_cb(self, data):
     # Creates callback to send message in IOLoop.
     def send_message(self, data):
         self.data = data
-        self.worker = threading.Thread(target = self.run)
+        self.worker = threading.Thread(target=self.run)
         self.worker.start()