diff --git a/deadlock_data_api/logging_middleware.py b/deadlock_data_api/logging_middleware.py
index 84a7243..2142d99 100644
--- a/deadlock_data_api/logging_middleware.py
+++ b/deadlock_data_api/logging_middleware.py
@@ -1,3 +1,4 @@
+import json
 import logging
 import time
 from collections.abc import Callable
@@ -27,7 +28,7 @@ async def dispatch(self, req: Request, call_next: Callable) -> Response:
             self._logger.exception(e)
             raise
 
-        self._logger.info(logging_dict)
+        self._logger.info(json.dumps(logging_dict))
         return res
 
     async def _log_request(self, req: Request) -> dict[str, Any]: