diff --git a/mediator.py b/mediator.py
index 934b299..508b9d2 100644
--- a/mediator.py
+++ b/mediator.py
@@ -39,8 +39,8 @@ def handleConnections(self):
         targetHandler = threading.Thread(target=self.handleTargets)
         operatorHandler = threading.Thread(target=self.handleOperators)
         bridgeWorker = threading.Thread(target=self.bridgeConnections)
-        targetGreenRoom = threading.Thread(target=self.greenRoom, args=["target"])
-        operatorGreenRoom = threading.Thread(target=self.greenRoom, args=["operator"])
+        targetGreenRoom = threading.Thread(target=self.greenRoom, args=("target",))
+        operatorGreenRoom = threading.Thread(target=self.greenRoom, args=("operator",))
         # run in the background
         targetHandler.daemon = True
         operatorHandler.daemon = True