diff --git a/spec/opensearch-openapi.yaml b/spec/opensearch-openapi.yaml
index c835abf89..1673d43af 100644
--- a/spec/opensearch-openapi.yaml
+++ b/spec/opensearch-openapi.yaml
@@ -412,6 +412,8 @@ paths:
     $ref: 'namespaces/knn.yaml#/paths/~1_plugins~1_knn~1{node_id}~1stats'
   /_plugins/_knn/{node_id}/stats/{stat}:
     $ref: 'namespaces/knn.yaml#/paths/~1_plugins~1_knn~1{node_id}~1stats~1{stat}'
+  /_plugins/_notifications/channels:
+    $ref: 'namespaces/notifications.yaml#/paths/~1_plugins~1_notifications~1channels'
   /_plugins/_notifications/configs:
     $ref: 'namespaces/notifications.yaml#/paths/~1_plugins~1_notifications~1configs'
   /_plugins/_notifications/configs/{config_id}: