diff --git a/hbd/server/config.py b/hbd/server/config.py
index 67e8fdc..601b013 100644
--- a/hbd/server/config.py
+++ b/hbd/server/config.py
@@ -95,7 +95,7 @@ THRESHOLD_DEFAULTS = {
             },
             'rtt': {
                 'warning': 200,
-                'critical': 250.0
+                'critical': 250.0,
                 'count': 3  # Optional: number of consecutive breaches before alerting
             }
         }