diff --git a/njcn-common/src/main/java/com/njcn/common/utils/JwtUtil.java b/njcn-common/src/main/java/com/njcn/common/utils/JwtUtil.java
index b50890f..a9080a9 100644
--- a/njcn-common/src/main/java/com/njcn/common/utils/JwtUtil.java
+++ b/njcn-common/src/main/java/com/njcn/common/utils/JwtUtil.java
@@ -42,7 +42,7 @@ public class JwtUtil {
         payload.put(SecurityConstants.USER_ID, userId);
         payload.put(SecurityConstants.Login_Name, loginName);
         // 永不过期
-        payload.put("exp", "4910070710");
+        payload.put("exp", 4910070710L);
         payload.put("sub", SUBJECT);
         payload.put("iss", JWT_ISS);
         payload.put("iat", Instant.now().getEpochSecond());