diff --git a/src/Drivers/DriverInterface.php b/src/Drivers/DriverInterface.php
index eec5c73..2d2b13d 100644
--- a/src/Drivers/DriverInterface.php
+++ b/src/Drivers/DriverInterface.php
@@ -40,7 +40,7 @@ public function verifyWithExtra($inputs);
     public function setAddress($inputs);
 
     /**
-     * activate sandbox mod for dev environment
+     * activate sandbox mod for dev environment.
      */
     public function enableSandbox();
 }
diff --git a/src/Laravel/ZarinpalServiceProvider.php b/src/Laravel/ZarinpalServiceProvider.php
index 94354b9..867f0dd 100644
--- a/src/Laravel/ZarinpalServiceProvider.php
+++ b/src/Laravel/ZarinpalServiceProvider.php
@@ -25,7 +25,7 @@ public function register()
 
             $zarinpal = new Zarinpal($merchantID, $this->app->make(DriverInterface::class));
 
-            if(config('services.zarinpal.sandbox',false)){
+            if (config('services.zarinpal.sandbox', false)) {
                 $zarinpal->enableSandbox();
             }
 
diff --git a/src/Zarinpal.php b/src/Zarinpal.php
index f727599..5c560e3 100644
--- a/src/Zarinpal.php
+++ b/src/Zarinpal.php
@@ -94,8 +94,6 @@ public function getDriver()
         return $this->driver;
     }
 
-    /**
-     */
     public function enableSandbox()
     {
         return $this->getDriver()->enableSandbox();