diff --git a/pipeline/schema/schema.json b/pipeline/schema/schema.json
index fe0d94eee..ab31f0cb0 100644
--- a/pipeline/schema/schema.json
+++ b/pipeline/schema/schema.json
@@ -348,7 +348,7 @@
       }
     },
     "event_enum": {
-      "enum": ["push", "pull_request", "tag", "deployment", "cron"]
+      "enum": ["push", "pull_request", "tag", "deployment", "cron", "manual"]
     },
     "constraint_list": {
       "oneOf": [