diff --git a/gateway/src/index.ts b/gateway/src/index.ts
index a3cc18b..a872137 100644
--- a/gateway/src/index.ts
+++ b/gateway/src/index.ts
@@ -440,3 +440,4 @@ main().catch((error) => {
   process.exit(1);
 });
 
+// v2.2.1