diff --git a/src/MaaWpfGui/Helper/ETagCache.cs b/src/MaaWpfGui/Helper/ETagCache.cs
index 16f5be76c1..216a102612 100644
--- a/src/MaaWpfGui/Helper/ETagCache.cs
+++ b/src/MaaWpfGui/Helper/ETagCache.cs
@@ -65,13 +65,13 @@ namespace MaaWpfGui.Helper
                 return string.Empty;
             }
 
-            return _cache.TryGetValue(url, out string ret) ? ret : string.Empty;
+            return _cache.TryGetValue(url.Replace("#", "%23"), out string ret) ? ret : string.Empty;
         }
 
         // ReSharper disable once MemberCanBePrivate.Global
         public static void Set(string url, string etag)
         {
-            _cache[url] = etag;
+            _cache[url.Replace("#", "%23")] = etag;
             Save();
         }
 
diff --git a/src/MaaWpfGui/Models/ResourceUpdater.cs b/src/MaaWpfGui/Models/ResourceUpdater.cs
index 2edfaf3644..60928723c9 100644
--- a/src/MaaWpfGui/Models/ResourceUpdater.cs
+++ b/src/MaaWpfGui/Models/ResourceUpdater.cs
@@ -232,7 +232,7 @@ namespace MaaWpfGui.Models
             {
                 await Task.Delay(1000);
 
-                var sRet = await UpdateFileWithETag(baseUrl, file, file);
+                var sRet = await UpdateFileWithETag(baseUrl, file.Replace("#", "%23"), file);
 
                 if (sRet == UpdateResult.Failed)
                 {