diff --git a/services/external-actor-gateway-service/openapi.yaml b/services/external-actor-gateway-service/openapi.yaml
index a6a714e..441f3ac 100644
--- a/services/external-actor-gateway-service/openapi.yaml
+++ b/services/external-actor-gateway-service/openapi.yaml
@@ -722,6 +722,10 @@ paths:
           required: false
           schema:
             type: string
+            enum:
+              - archived
+              - draft
+              - published
   /v0/page_groups/{page_group_id}:
     get:
       description: Retrieve a specific page group by ID.