diff --git a/Assets/AsmdefHelper/CustomCreate/Editor/AsmdefCustomCreateView.cs b/Assets/AsmdefHelper/CustomCreate/Editor/AsmdefCustomCreateView.cs
index c35fea4..d9e8a0d 100644
--- a/Assets/AsmdefHelper/CustomCreate/Editor/AsmdefCustomCreateView.cs
+++ b/Assets/AsmdefHelper/CustomCreate/Editor/AsmdefCustomCreateView.cs
@@ -33,43 +33,43 @@ namespace AsmdefHelper.CustomCreate.Editor {
             root.Add(labelFromUXML);
 
             // UI取得
-            var PathTextField = root.Q<TextField>(className: "PathTextField");
-            var NameTextField = root.Q<TextField>(className: "NameTextField");
-            var AllowUnsafeToggle = root.Q<Toggle>(className: "AllowUnsafeToggle");
-            var AutoReferencedToggle = root.Q<Toggle>(className: "AutoReferencedToggle");
-            var NoEngineReferencesToggle = root.Q<Toggle>(className: "NoEngineReferencesToggle");
-            var OverrideReferencesToggle = root.Q<Toggle>(className: "OverrideReferencesToggle");
-            var RootNamespaceTextField = root.Q<TextField>(className: "RootNamespaceTextField");
-            var IsEditorToggle = root.Q<Toggle>(className: "IsEditorToggle");
-            var CreateButton = root.Q<Button>(className: "CreateButton");
+            var pathTextField = root.Q<TextField>(className: "PathTextField");
+            var nameTextField = root.Q<TextField>(className: "NameTextField");
+            var allowUnsafeToggle = root.Q<Toggle>(className: "AllowUnsafeToggle");
+            var autoReferencedToggle = root.Q<Toggle>(className: "AutoReferencedToggle");
+            var noEngineReferencesToggle = root.Q<Toggle>(className: "NoEngineReferencesToggle");
+            var overrideReferencesToggle = root.Q<Toggle>(className: "OverrideReferencesToggle");
+            var rootNamespaceTextField = root.Q<TextField>(className: "RootNamespaceTextField");
+            var isEditorToggle = root.Q<Toggle>(className: "IsEditorToggle");
+            var createButton = root.Q<Button>(className: "CreateButton");
 
             // PathとNameの初期値
             var asset = Selection.activeObject;
             var assetPath = AssetDatabase.GetAssetPath(asset);
             var directory = string.IsNullOrWhiteSpace(assetPath) ? "Assets/" : assetPath;
-            PathTextField.value = directory;
+            pathTextField.value = directory;
             var defaultName = directory.Replace("Assets/", "").Replace('/', '.');
-            NameTextField.value = defaultName;
+            nameTextField.value = defaultName;
 
             // RootNamespace が設定できるのは2020.2以降
 #if UNITY_2020_2_OR_NEWER
-            RootNamespaceTextField.value = defaultName;
+            rootNamespaceTextField.value = defaultName;
 #else
-            root.Q<Box>(className: "Box").Remove(RootNamespaceTextField);
+            root.Q<Box>(className: "Box").Remove(rootNamespaceTextField);
 #endif
             // .asmdefを作成して閉じる
-            CreateButton.clickable.clicked += () => {
-                var asmdefName = NameTextField.value;
+            createButton.clickable.clicked += () => {
+                var asmdefName = nameTextField.value;
                 var asmdef = new AssemblyDefinitionJson {
                     name = asmdefName,
 #if UNITY_2020_2_OR_NEWER
-                    rootNamespace = RootNamespaceTextField.value,
+                    rootNamespace = rootNamespaceTextField.value,
 #endif
-                    allowUnsafeCode = AllowUnsafeToggle.value,
-                    autoReferenced = AutoReferencedToggle.value,
-                    overrideReferences = OverrideReferencesToggle.value,
-                    noEngineReferences = NoEngineReferencesToggle.value,
-                    includePlatforms = IsEditorToggle.value ? new[] { "Editor" } : new string[0]
+                    allowUnsafeCode = allowUnsafeToggle.value,
+                    autoReferenced = autoReferencedToggle.value,
+                    overrideReferences = overrideReferencesToggle.value,
+                    noEngineReferences = noEngineReferencesToggle.value,
+                    includePlatforms = isEditorToggle.value ? new[] { "Editor" } : new string[0]
                 };
                 var asmdefJson = JsonUtility.ToJson(asmdef, true);
                 var asmdefPath = $"{directory}/{asmdefName}.asmdef";
diff --git a/Assets/AsmdefHelper/CustomCreate/Editor/AsmdefRenameView.cs b/Assets/AsmdefHelper/CustomCreate/Editor/AsmdefRenameView.cs
index 08ca10e..8665f26 100644
--- a/Assets/AsmdefHelper/CustomCreate/Editor/AsmdefRenameView.cs
+++ b/Assets/AsmdefHelper/CustomCreate/Editor/AsmdefRenameView.cs
@@ -21,8 +21,8 @@ namespace AsmdefHelper.CustomCreate.Editor {
             if (extension == "asmdef") {
                 var window = GetWindow<AsmdefRenameView>();
                 window.titleContent = new GUIContent("AsmdefRenameView");
-                window.minSize = new Vector2(200, 80);
-                window.maxSize = new Vector2(2000, 80);
+                window.minSize = new Vector2(200, 100);
+                window.maxSize = new Vector2(2000, 100);
             }
         }
 
@@ -44,29 +44,42 @@ namespace AsmdefHelper.CustomCreate.Editor {
             root.Add(labelFromUXML);
 
             // UI取得
-            var PathTextField = root.Q<TextField>(className: "PathTextField");
-            var NameTextField = root.Q<TextField>(className: "NameTextField");
-            var CreateButton = root.Q<Button>(className: "RenameButton");
+            var pathTextField = root.Q<TextField>(className: "PathTextField");
+            var nameTextField = root.Q<TextField>(className: "NameTextField");
+            var rootNamespaceTextField = root.Q<TextField>(className: "RootNamespaceTextField");
+            var createButton = root.Q<Button>(className: "RenameButton");
 
             // 既存のasmdef読み込み
             var orgText = File.ReadAllText(renameAsmdefPath);
             var asmdef = JsonUtility.FromJson<AssemblyDefinitionJson>(orgText);
 
             // 既存パラメータの反映
-            PathTextField.value = asmdefDirectory;
-            NameTextField.value = asmdef.name;
+            pathTextField.value = asmdefDirectory;
+            nameTextField.value = asmdef.name;
+            var asmdefNameOrg = asmdef.name;
+
+            // RootNamespace が設定できるのは2020.2以降
+#if UNITY_2020_2_OR_NEWER
+            rootNamespaceTextField.value = asmdef.rootNamespace;
+#else
+            root.Q<Box>(className: "Box").Remove(rootNamespaceTextField);
+#endif
 
             // .asmdefのnameとファイル名を更新して閉じる
-            CreateButton.clickable.clicked += () => {
-                // nameのみ更新
-                var asmdefName = NameTextField.value;
+            createButton.clickable.clicked += () => {
+                var asmdefName = nameTextField.value;
                 asmdef.name = asmdefName;
+#if UNITY_2020_2_OR_NEWER
+                asmdef.rootNamespace = rootNamespaceTextField.value;
+#endif
                 var asmdefJson = JsonUtility.ToJson(asmdef, true);
                 var newAsmdefPath = $"{asmdefDirectory}/{asmdefName}.asmdef";
                 // 新asmdef作成
                 File.WriteAllText(newAsmdefPath, asmdefJson, Encoding.UTF8);
-                // 旧asmdef削除
-                File.Delete(renameAsmdefPath);
+                // ファイル名が変わった場合は旧asmdef削除
+                if (asmdefNameOrg != asmdefName) {
+                    FileUtil.DeleteFileOrDirectory(renameAsmdefPath);
+                }
                 AssetDatabase.Refresh();
                 Close();
             };
diff --git a/Assets/AsmdefHelper/CustomCreate/Editor/AsmdefRenameView.uxml b/Assets/AsmdefHelper/CustomCreate/Editor/AsmdefRenameView.uxml
index d9af47f..00b3a97 100644
--- a/Assets/AsmdefHelper/CustomCreate/Editor/AsmdefRenameView.uxml
+++ b/Assets/AsmdefHelper/CustomCreate/Editor/AsmdefRenameView.uxml
@@ -9,6 +9,7 @@
     <engine:Box>
         <engine:TextField class="PathTextField"  label="Path" text="ASMDEF_PATH_HERE"  readonly="true"/>
         <engine:TextField class="NameTextField"  label="Name" text="ASMDEF_NAME_HERE"/>
+        <engine:TextField label="Root Namespace" text="ROOT_NAMESPACE_HERE" class="RootNamespaceTextField" />
         <engine:Button class="RenameButton"  text="Rename" />
     </engine:Box>
 </engine:UXML>
diff --git a/Assets/package.json b/Assets/package.json
index 54cfb5d..abd24af 100644
--- a/Assets/package.json
+++ b/Assets/package.json
@@ -1,7 +1,7 @@
 {
     "name": "dev.n5y.asmdefhelper",
     "displayName": "AsmdefHelper",
-    "version": "0.5.0",
+    "version": "0.5.1",
     "unity": "2019.3",
     "description": "Unity assembly definition utilities.",
     "keywords": ["asmdef", "editor"],
diff --git a/Packages/manifest.json b/Packages/manifest.json
index ac73ebc..7f5ca6b 100644
--- a/Packages/manifest.json
+++ b/Packages/manifest.json
@@ -1,8 +1,8 @@
 {
   "dependencies": {
-    "com.unity.ide.rider": "3.0.6",
-    "com.unity.ide.visualstudio": "2.0.7",
-    "com.unity.test-framework": "1.1.24",
+    "com.unity.ide.rider": "3.0.7",
+    "com.unity.ide.visualstudio": "2.0.9",
+    "com.unity.test-framework": "1.1.27",
     "com.unity.modules.ai": "1.0.0",
     "com.unity.modules.androidjni": "1.0.0",
     "com.unity.modules.animation": "1.0.0",
diff --git a/Packages/packages-lock.json b/Packages/packages-lock.json
index bb34d7a..ef065bd 100644
--- a/Packages/packages-lock.json
+++ b/Packages/packages-lock.json
@@ -8,7 +8,7 @@
       "url": "https://packages.unity.com"
     },
     "com.unity.ide.rider": {
-      "version": "3.0.6",
+      "version": "3.0.7",
       "depth": 0,
       "source": "registry",
       "dependencies": {
@@ -17,7 +17,7 @@
       "url": "https://packages.unity.com"
     },
     "com.unity.ide.visualstudio": {
-      "version": "2.0.7",
+      "version": "2.0.9",
       "depth": 0,
       "source": "registry",
       "dependencies": {
@@ -26,7 +26,7 @@
       "url": "https://packages.unity.com"
     },
     "com.unity.test-framework": {
-      "version": "1.1.24",
+      "version": "1.1.27",
       "depth": 0,
       "source": "registry",
       "dependencies": {
diff --git a/ProjectSettings/ProjectVersion.txt b/ProjectSettings/ProjectVersion.txt
index 69d23f7..b9bf3e6 100644
--- a/ProjectSettings/ProjectVersion.txt
+++ b/ProjectSettings/ProjectVersion.txt
@@ -1,2 +1,2 @@
-m_EditorVersion: 2021.1.7f1
-m_EditorVersionWithRevision: 2021.1.7f1 (d91830b65d9b)
+m_EditorVersion: 2021.1.16f1
+m_EditorVersionWithRevision: 2021.1.16f1 (5fa502fca597)
diff --git a/README.md b/README.md
index b05e7db..e412186 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,13 @@ Unity assembly definition utilities.
 
 This library solve inconvenience of assembly definition on unity.
 
+### install via upm
+Please add this line to `dependencies` of `Packages/manifest.json`.
+
+```
+"dev.n5y.asmdefhelper": "https://github.com/naninunenoy/AsmdefHelper.git?path=Assets"
+```
+
 ## Dependency Graph
 
 Unity assembly definition viewer.
@@ -63,7 +70,7 @@ And you can also rename an asmdef by one action.
 ___
 
 ## Environment
-Unity 2021.1.7f1
+Unity 2021.1.16f1
 
 This library use unity internal class, so may be not work (or couse build error) depending your unity vresion.