diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/service/LoginService.java b/src/main/java/com/chaozhanggui/system/cashierservice/service/LoginService.java
index e5d2459..d80162d 100644
--- a/src/main/java/com/chaozhanggui/system/cashierservice/service/LoginService.java
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/service/LoginService.java
@@ -147,7 +147,7 @@ public class LoginService {
         accountMap.put("userCode", tbPlussShopStaff.getCode());
         accountMap.put("token", token);
         accountMap.put("loginTime", System.currentTimeMillis());
-        accountMap.put("expireDate", null);
+        accountMap.put("expireDate", "");
         if (Objects.nonNull(shopInfo)) {
             accountMap.put("shopName", shopInfo.getShopName());
             if(shopInfo.getExpireAt() != null) {