diff --git a/src/MaaWpfGui/Helper/ETagCache.cs b/src/MaaWpfGui/Helper/ETagCache.cs
index ed32614cae..ac3235644a 100644
--- a/src/MaaWpfGui/Helper/ETagCache.cs
+++ b/src/MaaWpfGui/Helper/ETagCache.cs
@@ -73,10 +73,10 @@ namespace MaaWpfGui.Helper
             Save();
         }
 
-        public static void Set(HttpResponseMessage? response)
+        // UPDATE: 重定向会导致 uri 变成其他地址，导致存的 ETag 无法匹配原始地址，所以要传入原始地址
+        public static void Set(HttpResponseMessage? response, string uri)
         {
             var etag = response?.Headers.ETag?.Tag;
-            var uri = response?.RequestMessage?.RequestUri?.ToString();
             if (string.IsNullOrEmpty(uri) || string.IsNullOrEmpty(etag))
             {
                 return;
diff --git a/src/MaaWpfGui/Services/Web/MaaApiService.cs b/src/MaaWpfGui/Services/Web/MaaApiService.cs
index 7676f6d7c7..2ccad878b6 100644
--- a/src/MaaWpfGui/Services/Web/MaaApiService.cs
+++ b/src/MaaWpfGui/Services/Web/MaaApiService.cs
@@ -57,7 +57,7 @@ namespace MaaWpfGui.Services.Web
 
                 await File.WriteAllTextAsync(cache, body);
 
-                ETagCache.Set(response);
+                ETagCache.Set(response, url);
 
                 return json;
             }
diff --git a/src/MaaWpfGui/ViewModels/UI/AnnouncementViewModel.cs b/src/MaaWpfGui/ViewModels/UI/AnnouncementViewModel.cs
index 6881079305..cb811b6a80 100644
--- a/src/MaaWpfGui/ViewModels/UI/AnnouncementViewModel.cs
+++ b/src/MaaWpfGui/ViewModels/UI/AnnouncementViewModel.cs
@@ -257,7 +257,7 @@ namespace MaaWpfGui.ViewModels.UI
                 DoNotRemindThisAnnouncementAgain = false;
             }
 
-            ETagCache.Set(response);
+            ETagCache.Set(response, url);
             ETagCache.Save();
         }