diff --git a/p1-logger/config.yml b/p1-logger/config.yml
index 28b7a9a..5a8020c 100644
--- a/p1-logger/config.yml
+++ b/p1-logger/config.yml
@@ -26,7 +26,7 @@ options:
   timezone: "Europe/Amsterdam"
 schema:
   db: str
-  mqtt_broker: url
+  mqtt_broker: str
   mqtt_topic: str
   mqtt_user: str
   mqtt_password: password