diff --git a/workspace/PinFile b/workspace/PinFile
index 6373dff..e3236fe 100644
--- a/workspace/PinFile
+++ b/workspace/PinFile
@@ -54,7 +54,7 @@ jenkins-slave:
         context: True
         actions:
           - playbook: site.yml
-            extra_vars: {{ extra_vars }}
+            extra_vars: "{{ extra_vars }}"
       {% endif %}
     {% endif %}
   {% endif %}