diff --git a/ariadne/services/firefly.py b/ariadne/services/firefly.py
index 5874824..816a68c 100644
--- a/ariadne/services/firefly.py
+++ b/ariadne/services/firefly.py
@@ -649,6 +649,7 @@ class FireflyService:
                 counters.failures += 1
 
         summary = counters.summary()
+        summary_payload = summary.__dict__
         logger.info(
             "firefly user sync finished",
             extra={
@@ -660,7 +661,7 @@ class FireflyService:
                 "failures": summary.failures,
             },
         )
-        return {"status": counters.status(), "summary": summary}
+        return {"status": counters.status(), "summary": summary_payload}
 
 
 firefly = FireflyService()