diff --git a/backend/services/scaling-service/scaling_algorithms/default/default.go b/backend/services/scaling-service/scaling_algorithms/default/default.go
index 428079481ba..2adf68f2706 100644
--- a/backend/services/scaling-service/scaling_algorithms/default/default.go
+++ b/backend/services/scaling-service/scaling_algorithms/default/default.go
@@ -354,7 +354,7 @@ func (s *DefaultScalingAlgorithm) ProcessEvents(globalCtx context.Context, gorou
 							contextFields := []interface{}{
 								zap.String("id", serverEvent.ID),
 								zap.Any("type", serverEvent.Type),
-								zap.Any("data", serverEvent.Data),
+								zap.String("data", utils.Sprintf("%v", serverEvent.Data)),
 								zap.String("region", serverEvent.Region),
 							}
 							logger.Errorw(utils.Sprintf("error running mandelbox assign action: %s", err), contextFields)