diff --git a/Editor/BuildProcessors/CheckSettings.cs b/Editor/BuildProcessors/CheckSettings.cs
index dd397aa..a5840bc 100644
--- a/Editor/BuildProcessors/CheckSettings.cs
+++ b/Editor/BuildProcessors/CheckSettings.cs
@@ -56,6 +56,11 @@ namespace HybridCLR.Editor.BuildProcessors
                 throw new BuildFailedException($"You have not initialized HybridCLR, please install it via menu 'HybridCLR/Installer'");
             }
 
+            if (installer.PackageVersion != installer.InstalledLibil2cppVersion)
+            {
+                throw new BuildFailedException($"You must run `HybridCLR/Installer` after upgrading package");
+            }
+
             HybridCLRSettings gs = SettingsUtil.HybridCLRSettings;
             if (((gs.hotUpdateAssemblies?.Length + gs.hotUpdateAssemblyDefinitions?.Length) ?? 0) == 0)
             {
diff --git a/Editor/Installer/InstallerController.cs b/Editor/Installer/InstallerController.cs
index 768515f..c44186f 100644
--- a/Editor/Installer/InstallerController.cs
+++ b/Editor/Installer/InstallerController.cs
@@ -27,12 +27,15 @@ namespace HybridCLR.Editor.Installer
 
         public string PackageVersion { get; private set; }
 
+        public string InstalledLibil2cppVersion { get; private set; }
+
         public InstallerController()
         {
             _curVersion = ParseUnityVersion(Application.unityVersion);
             _versionManifest = GetHybridCLRVersionManifest();
             _curDefaultVersion = _versionManifest.versions.FirstOrDefault(v => v.unity_version == _curVersion.major.ToString());
             PackageVersion = LoadPackageInfo().version;
+            InstalledLibil2cppVersion = ReadLocalVersion();
         }
 
         private HybridclrVersionManifest GetHybridCLRVersionManifest()
@@ -157,6 +160,23 @@ namespace HybridCLR.Editor.Installer
 
         public string ApplicationIl2cppPath => GetIl2CppPathByContentPath(EditorApplication.applicationContentsPath);
 
+        public string LocalVersionFile => $"{SettingsUtil.LocalIl2CppDir}/libil2cpp/hybridclr/generated/libil2cpp-version.txt";
+
+        private string ReadLocalVersion()
+        {
+            if (!File.Exists(LocalVersionFile))
+            {
+                return null;
+            }
+            return File.ReadAllText(LocalVersionFile, Encoding.UTF8);
+        }
+
+        public void WriteLocalVersion()
+        {
+            InstalledLibil2cppVersion = PackageVersion;
+            File.WriteAllText(LocalVersionFile, PackageVersion, Encoding.UTF8);
+        }
+
         public void InstallDefaultHybridCLR()
         {
             InstallFromLocal(PrepareLibil2cppWithHybridclrFromGitRepo());
@@ -237,6 +257,7 @@ namespace HybridCLR.Editor.Installer
 
             if (HasInstalledHybridCLR())
             {
+                WriteLocalVersion();
                 Debug.Log("Install Sucessfully");
             }
             else
diff --git a/Editor/Installer/InstallerWindow.cs b/Editor/Installer/InstallerWindow.cs
index f1a2b62..178db1e 100644
--- a/Editor/Installer/InstallerWindow.cs
+++ b/Editor/Installer/InstallerWindow.cs
@@ -46,7 +46,9 @@ namespace HybridCLR.Editor.Installer
 
             EditorGUILayout.LabelField($"Package Version:     v{_controller.PackageVersion}");
             GUILayout.Space(5f);
-            
+            EditorGUILayout.LabelField($"Installed libil2cpp Version:     {_controller.InstalledLibil2cppVersion ?? "Unknown"}");
+            GUILayout.Space(5f);
+
             GUILayout.Space(10f);
 
             InstallerController.CompatibleType compatibleType = _controller.GetCompatibleType();