diff --git a/Editor/PackageManager/PackageManagerCheckTool.cs b/Editor/PackageManager/PackageManagerCheckTool.cs
index 9c59a71..79802b4 100644
--- a/Editor/PackageManager/PackageManagerCheckTool.cs
+++ b/Editor/PackageManager/PackageManagerCheckTool.cs
@@ -36,7 +36,7 @@ namespace AlicizaX.PackageManager.Editor
                     var cachePath = FindInPackageCache(package.name);
                     if (!string.IsNullOrEmpty(cachePath))
                     {
-                        var localTime = Directory.GetLastWriteTimeUtc(cachePath);
+                        var localTime = Directory.GetLastWriteTime(cachePath);
                         if (DateTime.TryParse(package.updatedAt, out var remoteTime))
                         {
                             package.PackageState = remoteTime > localTime ? PackageState.Update : PackageState.Install;
@@ -65,15 +65,7 @@ namespace AlicizaX.PackageManager.Editor
             var cacheRoot = Path.GetFullPath("Library/PackageCache");
             if (!Directory.Exists(cacheRoot)) return null;
 
-            foreach (var dir in Directory.GetDirectories(cacheRoot))
-            {
-                if (dir.Contains(packageName + "@"))
-                {
-                    return dir;
-                }
-            }
-
-            return null;
+            return Path.Combine(cacheRoot, packageName);
         }
 
         private static ManifestDependencies ReadManifestFile()