diff --git a/spiffworkflow-backend/src/spiffworkflow_backend/constants.py b/spiffworkflow-backend/src/spiffworkflow_backend/constants.py
index ac05988e..b1811f01 100644
--- a/spiffworkflow-backend/src/spiffworkflow_backend/constants.py
+++ b/spiffworkflow-backend/src/spiffworkflow_backend/constants.py
@@ -1 +1 @@
-SPIFFWORKFLOW_BACKEND_SERIALIZER_VERSION = "4"
+SPIFFWORKFLOW_BACKEND_SERIALIZER_VERSION = "5"