diff --git a/utils_v2/payments/safaricom/models/api_call.py b/utils_v2/payments/safaricom/models/api_call.py
index 076c3fd..fb05830 100644
--- a/utils_v2/payments/safaricom/models/api_call.py
+++ b/utils_v2/payments/safaricom/models/api_call.py
@@ -82,6 +82,7 @@ class MPesaExpressApiResponse(BaseModel):
     success: bool = False
     message: str = None
     data: Any = None
+    referenceId: str | None = None
 
     exception: Any = None