diff --git a/spec/fixtures/api/schemas/public_api/v4/tag.json b/spec/fixtures/api/schemas/public_api/v4/tag.json
index 5713ea1f526..bb0190955f0 100644
--- a/spec/fixtures/api/schemas/public_api/v4/tag.json
+++ b/spec/fixtures/api/schemas/public_api/v4/tag.json
@@ -16,7 +16,8 @@
         { "type": "null" },
         { "$ref": "release/tag_release.json" }
       ]
-    }
+    },
+    "protected": { "type": "boolean" }
   },
   "additionalProperties": false
 }