diff --git a/src/aibs_informatics_cdk_lib/stacks/core.py b/src/aibs_informatics_cdk_lib/stacks/core.py
index 70ca2fc..b3b26bb 100644
--- a/src/aibs_informatics_cdk_lib/stacks/core.py
+++ b/src/aibs_informatics_cdk_lib/stacks/core.py
@@ -207,7 +207,7 @@ def create_step_functions(self, file_system: Optional[efs.FileSystem] = None):
             "Merge",
             parameters={
                 "request": sfn.JsonPath.json_merge(
-                    sfn.JsonPath.object_at("$.input"), sfn.JsonPath.object_at("$.default")
+                    sfn.JsonPath.object_at("$.default"), sfn.JsonPath.object_at("$.input")
                 ),
             },
         )