diff --git a/Editor/Installer/InstallerWindow.cs b/Editor/Installer/InstallerWindow.cs
index 345416a..0074ded 100644
--- a/Editor/Installer/InstallerWindow.cs
+++ b/Editor/Installer/InstallerWindow.cs
@@ -10,12 +10,14 @@ namespace HybridCLR.Editor.Installer
     {
         private InstallerController m_Controller;
 
-        string _hybridclrVersion = "";
-        string _il2cppPlusVersion = "";
+        string _hybridclrVersion;
+        string _il2cppPlusVersion;
 
         private void OnEnable()
         {
             m_Controller = new InstallerController();
+            _hybridclrVersion = "1.0";
+            _il2cppPlusVersion = $"{m_Controller.Il2CppBranch}-1.0";
         }
 
         private void OnGUI()
@@ -138,7 +140,9 @@ namespace HybridCLR.Editor.Installer
 
         private void InitHybridCLR()
         {
-            m_Controller.InitHybridCLR(m_Controller.Il2CppBranch, m_Controller.Il2CppInstallDirectory, _hybridclrVersion, _il2cppPlusVersion);
+            string hybridclrVersion = string.IsNullOrWhiteSpace(_hybridclrVersion) ? "1.0" : _hybridclrVersion;
+            string il2cppPlusVersion = string.IsNullOrWhiteSpace(_il2cppPlusVersion) ? $"{m_Controller.Il2CppBranch}-1.0" : _il2cppPlusVersion;
+            m_Controller.InitHybridCLR(m_Controller.Il2CppBranch, m_Controller.Il2CppInstallDirectory, hybridclrVersion, il2cppPlusVersion);
         }
 
         private void UpdateHybridCLR()
diff --git a/package.json b/package.json
index e0f2a84..c5c7fff 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "com.focus-creative-games.hybridclr_unity",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "displayName": "HybridCLR",
   "description": "Unity package for HybridCLR. It includes editor and runtime scripts and assets for HybridCLR",
   "category": "Runtime",