diff --git a/evibes/middleware.py b/evibes/middleware.py
index fa490e3d..b411eb05 100644
--- a/evibes/middleware.py
+++ b/evibes/middleware.py
@@ -106,7 +106,7 @@ class GrapheneLoggingErrorsDebugMiddleware:
         try:
             return next(root, info, **args)
         except Exception as e:
-            if e in self.WARNING_ONLY_ERRORS:
+            if any(isinstance(e, error_type) for error_type in self.WARNING_ONLY_ERRORS):
                 logger.warning(str(e))
             else:
                 logger.error(str(e))