diff --git a/packages/fe-mockserver-core/src/data/common.ts b/packages/fe-mockserver-core/src/data/common.ts
index 7903f8dec..686b369af 100644
--- a/packages/fe-mockserver-core/src/data/common.ts
+++ b/packages/fe-mockserver-core/src/data/common.ts
@@ -148,7 +148,7 @@ export class ExecutionError extends Error {
 
 export function _getDateTimeOffset(isV4: boolean) {
     const date = new Date();
-    return isV4 ? date.toISOString() : '/Date(' + date.getTime() + '/';
+    return isV4 ? date.toISOString() : '/Date(' + date.getTime() + ')/';
 }
 
 const CHARS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';