diff --git a/openstack_governance/projects_schema.yaml b/openstack_governance/projects_schema.yaml
index 96f4ff41c..8c941fc5c 100644
--- a/openstack_governance/projects_schema.yaml
+++ b/openstack_governance/projects_schema.yaml
@@ -11,6 +11,7 @@ additionalProperties:
     - ptl
     - deliverables
     - url
+    - mission
   properties:
     ptl:
       type: "object"