diff --git a/src/iotswarm/scripts/cli.py b/src/iotswarm/scripts/cli.py
index 5142770..32ba3d6 100644
--- a/src/iotswarm/scripts/cli.py
+++ b/src/iotswarm/scripts/cli.py
@@ -165,7 +165,7 @@ def mqtt(
     client_id: str,
     sleep_time: int,
     max_cycles: int,
-    max_sites: int ,
+    max_sites: int,
     swarm_name: str,
     delay_start: bool,
     mqtt_prefix: str,