diff --git a/.changeset/fresh-dodos-warn.md b/.changeset/fresh-dodos-warn.md
new file mode 100644
index 0000000..8dfd8cc
--- /dev/null
+++ b/.changeset/fresh-dodos-warn.md
@@ -0,0 +1,5 @@
+---
+'@rosen-bridge/watcher': patch
+---
+
+fix unlock api response schema
diff --git a/src/api/Transaction.ts b/src/api/Transaction.ts
index 076d17d..c75ad35 100644
--- a/src/api/Transaction.ts
+++ b/src/api/Transaction.ts
@@ -24,7 +24,7 @@ import { HealthCheckSingleton } from '../utils/healthCheck';
 const logger = WinstonLogger.getInstance().getLogger(import.meta.url);
 
 export type ApiResponse = {
-  response: string | string[];
+  response: string;
   status: number;
 };
 
diff --git a/src/api/permit.ts b/src/api/permit.ts
index fec48ba..4d2b1eb 100644
--- a/src/api/permit.ts
+++ b/src/api/permit.ts
@@ -59,7 +59,7 @@ permitRouter.post(
         BigInt(RWTCount)
       );
       if (response.status === 200) {
-        res.status(200).send({ txIds: response.response });
+        res.status(200).send({ txId: response.response });
       } else {
         res.status(response.status).send({ message: response.response });
       }