diff --git a/X4_ComplexCalculator/Localization/Lang.csv b/X4_ComplexCalculator/Localization/Lang.csv
index 5d3b0183..54f4bc8f 100644
--- a/X4_ComplexCalculator/Localization/Lang.csv
+++ b/X4_ComplexCalculator/Localization/Lang.csv
@@ -87,7 +87,6 @@ MainWindow_Menu_File_MenuItem_Import_MenuItem_Loadout_Header;Module equipments
 MainWindow_Menu_File_MenuItem_Export_Header;Export
 MainWindow_Menu_File_MenuItem_Export_MenuItem_StationCalculator_Header;Station Calculator
 MainWindow_Menu_File_UpdateDB_Header;Update DB
-MainWindow_Menu_File_UpdateDB_DBUpdate_ConfirmationMessage;Do you want to display the DB update screen?
 MainWindow_Menu_File_UpdateDB_DBUpdate_RestartRequestMessage;Please restart the application to apply the DB update.
 MainWindow_Menu_File_UpdateDB_DBUpdate_FailureMessage;Failed to update the DB, \r\nplease check if the DB file is accessible and try again.
 
diff --git a/X4_ComplexCalculator/Localization/Lang.ja-JP.csv b/X4_ComplexCalculator/Localization/Lang.ja-JP.csv
index 485f6df0..ccd4052e 100644
--- a/X4_ComplexCalculator/Localization/Lang.ja-JP.csv
+++ b/X4_ComplexCalculator/Localization/Lang.ja-JP.csv
@@ -87,7 +87,6 @@ MainWindow_Menu_File_MenuItem_Import_MenuItem_Loadout_Header;モジュールの
 MainWindow_Menu_File_MenuItem_Export_Header;エクスポート
 MainWindow_Menu_File_MenuItem_Export_MenuItem_StationCalculator_Header;Station Calculator
 MainWindow_Menu_File_UpdateDB_Header;DB更新
-MainWindow_Menu_File_UpdateDB_DBUpdate_ConfirmationMessage;DB更新画面を表示しますか？
 MainWindow_Menu_File_UpdateDB_DBUpdate_RestartRequestMessage;DBの更新を適用するためには本アプリケーションの再起動を行ってください。
 MainWindow_Menu_File_UpdateDB_DBUpdate_FailureMessage;DBの更新に失敗しました。\r\nDBファイルにアクセス可能か確認後、再度実行してください。
 
diff --git a/X4_ComplexCalculator/Main/MainWindowModel.cs b/X4_ComplexCalculator/Main/MainWindowModel.cs
index 3051d869..5e1aa9b2 100644
--- a/X4_ComplexCalculator/Main/MainWindowModel.cs
+++ b/X4_ComplexCalculator/Main/MainWindowModel.cs
@@ -77,26 +77,21 @@ public void Init()
     /// </summary>
     public void UpdateDB()
     {
-        var result = _localizedMessageBox.YesNo("Lang:MainWindow_Menu_File_UpdateDB_DBUpdate_ConfirmationMessage", "Lang:Common_MessageBoxTitle_Confirmation", LocalizedMessageBoxResult.Yes);
-
-        if (result == LocalizedMessageBoxResult.Yes)
+        switch (X4Database.UpdateDB())
         {
-            switch (X4Database.UpdateDB())
-            {
-                // DB更新成功
-                case X4Database.UpdateDbStatus.Succeeded:
-                    _localizedMessageBox.Ok("Lang:MainWindow_Menu_File_UpdateDB_DBUpdate_RestartRequestMessage", "Lang:Common_MessageBoxTitle_Confirmation");
-                    break;
-
-                // DB更新失敗
-                case X4Database.UpdateDbStatus.Failed:
-                    _localizedMessageBox.Error("Lang:MainWindow_Menu_File_UpdateDB_DBUpdate_FailureMessage", "Lang:Common_MessageBoxTitle_Error");
-                    break;
-
-                // 更新なし
-                default:
-                    break;
-            }
+            // DB更新成功
+            case X4Database.UpdateDbStatus.Succeeded:
+                _localizedMessageBox.Ok("Lang:MainWindow_Menu_File_UpdateDB_DBUpdate_RestartRequestMessage", "Lang:Common_MessageBoxTitle_Confirmation");
+                break;
+
+            // DB更新失敗
+            case X4Database.UpdateDbStatus.Failed:
+                _localizedMessageBox.Error("Lang:MainWindow_Menu_File_UpdateDB_DBUpdate_FailureMessage", "Lang:Common_MessageBoxTitle_Error");
+                break;
+
+            // 更新なし
+            default:
+                break;
         }
     }