diff --git a/klient/client.py b/klient/client.py
index 21410fd..3d6b666 100644
--- a/klient/client.py
+++ b/klient/client.py
@@ -57,7 +57,7 @@ def send_turn(turn: dict, round: int, args) -> bool:
             json=json.dumps(turn)
         )
     except requests.exceptions.RequestException as e:
-        logger.warning("Request error: {e}")
+        logger.warning(f"Request error: {e}")
         return False
     if not r.ok:
         logger.warning(f"Server error: {r.status_code} {r.reason}")