diff --git a/config/config.php b/config/config.php
index f83234d1..09a3342e 100644
--- a/config/config.php
+++ b/config/config.php
@@ -101,7 +101,7 @@
     |
     */
 
-    'ttl' => env('JWT_TTL', 60),
+    'ttl' => (int) env('JWT_TTL', 60),
 
     /*
     |--------------------------------------------------------------------------