diff --git a/Updated_Cms/app/Http/Middleware/LocalizationMiddleware.php b/Updated_Cms/app/Http/Middleware/LocalizationMiddleware.php
index 66e89a30ac..22631606b7 100644
--- a/Updated_Cms/app/Http/Middleware/LocalizationMiddleware.php
+++ b/Updated_Cms/app/Http/Middleware/LocalizationMiddleware.php
@@ -16,9 +16,11 @@ class LocalizationMiddleware
     {
         // Controleer of de instellingen bestaan en of de taal al in de sessie staat
         if (Schema::hasTable('website_settings') && Session::has('locale')) {
-            App::setLocale(Session::get('locale'));
+            App::setLocale((string) Session::get('locale'));
 
-            return $next($request);
+            $response = $next($request);
+            assert($response instanceof Response);
+            return $response;
         }
 
         $countryCode = config('habbo.site.default_language');
@@ -38,13 +40,17 @@ class LocalizationMiddleware
             App::setLocale($defaultCountry);
             Session::put('locale', $defaultCountry);
 
-            return $next($request);
+            $response = $next($request);
+            assert($response instanceof Response);
+            return $response;
         }
 
         // Zet de gedetecteerde taal
         App::setLocale($countryCode);
         Session::put('locale', $countryCode);
 
-        return $next($request);
+        $response = $next($request);
+        assert($response instanceof Response);
+        return $response;
     }
-}
\ No newline at end of file
+}