diff --git a/src/GoPaySDK.php b/src/GoPaySDK.php
index d4babb7..73f0f68 100644
--- a/src/GoPaySDK.php
+++ b/src/GoPaySDK.php
@@ -27,7 +27,7 @@ public function __construct()
             'goid' => config('gopay.goid'),
             'clientId' => config('gopay.clientId'),
             'clientSecret' => config('gopay.clientSecret'),
-            'isProductionMode' => !getenv('APP_DEBUG'),
+            'isProductionMode' => !filter_var(getenv('APP_DEBUG'), FILTER_VALIDATE_BOOLEAN),
             'timeout' => config('gopay.timeout')
         ];
 
@@ -138,4 +138,4 @@ public function log($closure)
         $this->logsBefore = [];
         return $this;
     }
-}
\ No newline at end of file
+}