diff --git a/GitMirror/app.py b/GitMirror/app.py
index f83a4f2d..bff1d298 100644
--- a/GitMirror/app.py
+++ b/GitMirror/app.py
@@ -100,7 +100,7 @@ class SyncWorker:
                 self.Queue.task_done()
 
     def _SyncWithRetry(self, RepoName: str, Repo: dict | None) -> None:
-        Delays = [5, 15, 45]
+        Delays = [10, 30, 60, 120]
         LastError: Exception | None = None
         for Attempt, Delay in enumerate([0] + Delays):
             if Delay:
diff --git a/GitMirror/mirror.py b/GitMirror/mirror.py
index 4738b518..8f76d53b 100644
--- a/GitMirror/mirror.py
+++ b/GitMirror/mirror.py
@@ -228,8 +228,11 @@ class GiteaClient:
         return Result
 
     def RegisterWebhook(self, Url: str, Secret: str) -> str:
-        """创建或更新组织级 webhook，返回 created/updated"""
-        Events = {'push': True, 'create': True, 'delete': True, 'repository': True}
+        """创建或更新组织级 webhook，返回 created/updated
+
+        Gitea 28.x 的 CreateHookOption.events 为字符串数组（不是对象）。
+        """
+        Events = ['push', 'create', 'delete', 'repository']
         Config = {'url': Url, 'content_type': 'json', 'secret': Secret}
         Hooks = self._Request('GET', f'/orgs/{self.Org}/hooks') or []
         for Hook in Hooks: