diff --git a/ariadne/services/wger.py b/ariadne/services/wger.py
index ddff949..8b3bebe 100644
--- a/ariadne/services/wger.py
+++ b/ariadne/services/wger.py
@@ -606,6 +606,7 @@ class WgerService:
                 counters.failures += 1
 
         summary = counters.summary()
+        summary_payload = summary.__dict__
         logger.info(
             "wger user sync finished",
             extra={
@@ -617,7 +618,7 @@ class WgerService:
                 "failures": summary.failures,
             },
         )
-        return {"status": counters.status(), "summary": summary}
+        return {"status": counters.status(), "summary": summary_payload}
 
 
 wger = WgerService()