diff --git a/CoreCms.Net.Task/RefreshWeChatAccessTokenJob.cs b/CoreCms.Net.Task/RefreshWeChatAccessTokenJob.cs
index 8b1cf25f..0f26278d 100644
--- a/CoreCms.Net.Task/RefreshWeChatAccessTokenJob.cs
+++ b/CoreCms.Net.Task/RefreshWeChatAccessTokenJob.cs
@@ -129,7 +129,7 @@ namespace CoreCms.Net.Task
                     else
                     {
                         var accessToken = WeChatCacheAccessTokenHelper.GetWeChatAccessToken();
-                        if (accessToken == null)
+                        if (string.IsNullOrEmpty(accessToken))
                         {
                             // 将时间戳转换为DateTime
                             var expireTime = DateTimeOffset.FromUnixTimeSeconds(entity.expireTimestamp).DateTime;
@@ -214,7 +214,7 @@ namespace CoreCms.Net.Task
                     else
                     {
                         var accessToken = WeChatCacheAccessTokenHelper.GetWxOpenAccessToken();
-                        if (accessToken == null)
+                        if (string.IsNullOrEmpty(accessToken))
                         {
                             // 将时间戳转换为DateTime
                             var expireTime = DateTimeOffset.FromUnixTimeSeconds(entity.expireTimestamp).DateTime;