diff --git a/slic/core/acquisition/broker_client.py b/slic/core/acquisition/broker_client.py
index a5dc5b5a..7f4c9a00 100644
--- a/slic/core/acquisition/broker_client.py
+++ b/slic/core/acquisition/broker_client.py
@@ -286,7 +286,7 @@ def validate_response(resp):
         return resp
 
     message = resp.get("message", "Unknown error")
-    msg = "An error happened on the server:\n{}".format(message)
+    msg = f"An error happened on the server:\n{message}"
     raise BrokerError(msg)