diff --git a/models/resources/native_tools/workflow_event.go b/models/resources/native_tools/workflow_event.go
index 1ab7d56..aafbb84 100644
--- a/models/resources/native_tools/workflow_event.go
+++ b/models/resources/native_tools/workflow_event.go
@@ -12,7 +12,7 @@ import (
 type WorkflowEventParams struct {
 	WorkflowResourceID string               `json:"workflow_execution_id" bson:"workflow_execution_id" validate:"required"`
 	ManualCheck        bool                 `json:"manual_check" bson:"manual_check"`
-	OutputPayload      []byte               `json:"output_payload" bson:"output_payload"`
+	OutputPayload      interface{}          `json:"output_payload" bson:"output_payload"`
 	BookingMode        *booking.BookingMode `json:"booking_mode" bson:"booking_mode"`
 }