diff --git a/src/Providers/LaravelInstallerServiceProvider.php b/src/Providers/LaravelInstallerServiceProvider.php
index 7edd83c..59c922e 100644
--- a/src/Providers/LaravelInstallerServiceProvider.php
+++ b/src/Providers/LaravelInstallerServiceProvider.php
@@ -32,7 +32,7 @@ public function register()
      */
     public function boot()
     {
-        app('router')->middleware('isInstalled', '\RachidLaasri\LaravelInstaller\Middleware\IsInstalled');
+        app('router')->middleware('isInstalled', '\RachidLaasri\LaravelInstaller\Middleware\isInstalled');
     }
 
     /**