diff --git a/src/LanguageSwitch.php b/src/LanguageSwitch.php
index bcef3e9..d8eb001 100755
--- a/src/LanguageSwitch.php
+++ b/src/LanguageSwitch.php
@@ -318,7 +318,7 @@ public function getCharAvatar(string $locale): string
             : str($locale)->upper()->toString();
     }
 
-    public static function trigger($locale)
+    public static function trigger(string $locale)
     {
         session()->put('locale', $locale);