diff --git a/beike/Installer/Controllers/FinalController.php b/beike/Installer/Controllers/FinalController.php
index 34d6adb1..654a6778 100644
--- a/beike/Installer/Controllers/FinalController.php
+++ b/beike/Installer/Controllers/FinalController.php
@@ -3,7 +3,6 @@
 namespace Beike\Installer\Controllers;
 
 use Illuminate\Routing\Controller;
-use RachidLaasri\LaravelInstaller\Events\LaravelInstallerFinished;
 use Beike\Installer\Helpers\EnvironmentManager;
 use Beike\Installer\Helpers\FinalInstallManager;
 use Beike\Installer\Helpers\InstalledFileManager;
@@ -24,8 +23,6 @@ class FinalController extends Controller
         $finalStatusMessage = $fileManager->update();
         $finalEnvFile = $environment->getEnvContent();
 
-        event(new LaravelInstallerFinished);
-
         $steps = 5;
 
         return view('installer::finished', compact('finalMessages', 'finalStatusMessage', 'finalEnvFile', 'steps'));
diff --git a/beike/Installer/Providers/InstallerServiceProvider.php b/beike/Installer/Providers/InstallerServiceProvider.php
index 781204d6..050f77fb 100644
--- a/beike/Installer/Providers/InstallerServiceProvider.php
+++ b/beike/Installer/Providers/InstallerServiceProvider.php
@@ -2,6 +2,7 @@
 
 namespace Beike\Installer\Providers;
 
+use Illuminate\Support\Facades\Schema;
 use Illuminate\Support\ServiceProvider;
 use Illuminate\Support\Str;
 
@@ -20,6 +21,8 @@ class InstallerServiceProvider extends ServiceProvider
             return;
         }
 
+        Schema::defaultStringLength(191);
+
         $this->mergeConfigFrom(__DIR__ . '/../config.php', 'installer');
         $this->loadViewsFrom(__DIR__ . '/../Views', 'installer');
 
diff --git a/beike/Installer/config.php b/beike/Installer/config.php
index 5ab7f3f5..ac8cd06d 100644
--- a/beike/Installer/config.php
+++ b/beike/Installer/config.php
@@ -67,12 +67,6 @@ return [
                 'database_name'         => 'required|string|max:50',
                 'database_username'     => 'required|string|max:50',
                 'database_password'     => 'nullable|string|max:50',
-                'mail_driver'           => 'required|string|max:50',
-                'mail_host'             => 'required|string|max:50',
-                'mail_port'             => 'required|string|max:50',
-                'mail_username'         => 'required|string|max:50',
-                'mail_password'         => 'required|string|max:50',
-                'mail_encryption'       => 'required|string|max:50',
             ],
         ],
     ],