diff --git a/src/Authentication/NamiGuard.php b/src/Authentication/NamiGuard.php
index 128b8f2..4f99b43 100644
--- a/src/Authentication/NamiGuard.php
+++ b/src/Authentication/NamiGuard.php
@@ -136,7 +136,7 @@ class NamiGuard {
     }
 
     /**
-     * @param array<string, string> $credentials
+     * @param array<string, int|string> $credentials
      */
     public function loginNami(array $credentials): bool
     {