diff --git a/roles/rabbitmq_cluster/tasks/main.yml b/roles/rabbitmq_cluster/tasks/main.yml
index 2b6525b09c..d7c8777795 100644
--- a/roles/rabbitmq_cluster/tasks/main.yml
+++ b/roles/rabbitmq_cluster/tasks/main.yml
@@ -257,7 +257,9 @@
   rabbitmq_parameter:
     component: federation-upstream
     name: pubsub-to-public_pubsub
-    value: '{"uri":"amqps://pubsub_federation:@rabbitmq01{{ env_suffix }}.phx2.fedoraproject.org/%2Fpubsub?cacertfile=%2Fetc%2Fpki%2Frabbitmq%2Fca%2Frabbitmq-ca.crt&certfile=%2Fetc%2Fpki%2Frabbitmq%2Fcrt%2Frabbitmq-pubsub_federation.crt&keyfile=%2Fetc%2Fpki%2Frabbitmq%2Fkey%2Frabbitmq-pubsub_federation.key&verify=verify_peer&fail_if_no_peer_cert=true&auth_mechanism=external","ack-mode":"on-confirm"}'
+    value:
+      uri: "amqps://pubsub_federation:@rabbitmq01{{ env_suffix }}.phx2.fedoraproject.org/%2Fpubsub?cacertfile=%2Fetc%2Fpki%2Frabbitmq%2Fca%2Frabbitmq-ca.crt&certfile=%2Fetc%2Fpki%2Frabbitmq%2Fcrt%2Frabbitmq-pubsub_federation.crt&keyfile=%2Fetc%2Fpki%2Frabbitmq%2Fkey%2Frabbitmq-pubsub_federation.key&verify=verify_peer&fail_if_no_peer_cert=true&auth_mechanism=external"
+      ack-mode: "confirm"
     state: present
     vhost: /public_pubsub