diff --git a/gso/workflows/router/validate_router.py b/gso/workflows/router/validate_router.py
index 05037b96f408e726520e1ff6b5170ed6d67a18be..a1fed75dc7792a8797f09c717661c16c74087bca 100644
--- a/gso/workflows/router/validate_router.py
+++ b/gso/workflows/router/validate_router.py
@@ -1,7 +1,10 @@
 """Router validation workflow. Used in a nightly schedule."""
 
+import json
+
 from orchestrator.targets import Target
 from orchestrator.utils.errors import ProcessFailureError
+from orchestrator.utils.json import json_dumps
 from orchestrator.workflow import StepList, begin, conditional, done, step, workflow
 from orchestrator.workflows.steps import resync, store_process_subscription, unsync
 from orchestrator.workflows.utils import wrap_modify_initial_input_form
@@ -67,7 +70,7 @@ def verify_base_config(subscription: Router, callback_route: str) -> None:
         callback_route=callback_route,
         inventory=subscription.router.router_fqdn,
         extra_vars={
-            "wfo_router_json": subscription,
+            "wfo_router_json": json.loads(json_dumps(subscription)),
             "verb": "deploy",
             "dry_run": "true",
             "is_verification_workflow": "true",