diff --git a/README.md b/README.md
index 3ab0db7..210d576 100644
--- a/README.md
+++ b/README.md
@@ -2,13 +2,14 @@
 
 This is a laravel sms package with multi driver support. Supports laravel **v8.0+** and requires php **v7.4+**
 
-> Star! if you used and liked this package.
+> Star! :star: if you used and liked this package.
 
 ## Supported SMS Providers
 
 - [Kavenegar](https://kavenegar.com)
 - [SMS.ir](https://sms.ir)
 - [FarazSMS](https://farazsms.com)
+
 ## Installation & Configuration
 
 Install using composer
diff --git a/config/sms.php b/config/sms.php
index 10ed044..2e1bb48 100644
--- a/config/sms.php
+++ b/config/sms.php
@@ -14,5 +14,6 @@
     'faraz_sms' => [
         'driver_class' => \Omalizadeh\Sms\Drivers\FarazSms\FarazSms::class,
         'api_key' => '',
+        'default_sender' => env('FARAZ_SMS_DEFAULT_SENDER', '+983000505'),
     ],
 ];
diff --git a/src/Drivers/FarazSms/FarazSms.php b/src/Drivers/FarazSms/FarazSms.php
index f625a64..92764b4 100644
--- a/src/Drivers/FarazSms/FarazSms.php
+++ b/src/Drivers/FarazSms/FarazSms.php
@@ -97,12 +97,14 @@ public function getBulkSmsUrl(): string
 
     protected function mergeSmsOptions(array $data, array $options): array
     {
-        if (!isset($options['sender'])) {
-            throw new InvalidParameterException('sender parameter is required.');
+        $sender =  $options['sender'] ?? $this->getConfig('default_sender');
+
+        if (empty($sender)) {
+            throw new InvalidParameterException('sender parameter is required for Faraz sms driver.');
         }
 
         return array_merge($data, [
-            'sender' => $options['sender'],
+            'sender' => $sender,
             'time' => $options['time'] ?? now()->addSecond(),
         ]);
     }
@@ -121,7 +123,7 @@ protected function mergeTemplateOptions(array $data, array $options): array
     protected function callApi(string $url, array $data)
     {
         if (empty($apiKey = $this->getConfig('api_key'))) {
-            throw new InvalidConfigurationException('invalid api_key sms provider config');
+            throw new InvalidConfigurationException('invalid api_key faraz sms provider config');
         }
 
         $response = Http::asJson()->acceptJson()->withHeaders([
diff --git a/tests/FarazSmsTest.php b/tests/FarazSmsTest.php
index 058e897..371c44a 100644
--- a/tests/FarazSmsTest.php
+++ b/tests/FarazSmsTest.php
@@ -3,6 +3,7 @@
 namespace Omalizadeh\Sms\Tests;
 
 
+use Illuminate\Support\Facades\Config;
 use Illuminate\Support\Facades\Http;
 use Omalizadeh\Sms\Drivers\FarazSms\FarazSms;
 use Omalizadeh\Sms\Exceptions\SendingSmsFailedException;
@@ -20,7 +21,7 @@ protected function setUp(): void
         $this->farazSms = new FarazSms(config('sms.faraz_sms'));
     }
 
-    public function test_sms_can_be_sent_successfully_by_faraz_driver()
+    public function test_sms_can_be_sent_successfully_by_faraz_driver(): void
     {
         Http::fake([
             'https://api2.ippanel.com/api/v1/sms/send/webservice/single' => Http::response([
@@ -30,7 +31,7 @@ public function test_sms_can_be_sent_successfully_by_faraz_driver()
                     'message_id' => '123456789'
                 ],
                 'error_message' => null
-            ], 200)
+            ])
         ]);
 
         $result = $this->farazSms->send('09123456789', 'Test message', ['sender' => '1000']);
@@ -46,14 +47,14 @@ public function test_sms_can_be_sent_successfully_by_faraz_driver()
         });
     }
 
-    public function test_sms_can_get_failed_successfully()
+    public function test_sms_can_get_failed_successfully(): void
     {
         Http::fake([
             'https://api2.ippanel.com/api/v1/sms/send/webservice/single' => Http::response([
                 'status' => 'error',
                 'code' => 5,
                 'message' => 'اعتبار کافی نیست.'
-            ], 200)
+            ])
         ]);
 
         $this->expectException(SendingSmsFailedException::class);
@@ -62,12 +63,12 @@ public function test_sms_can_get_failed_successfully()
         $this->farazSms->send('09123456789', 'Test message', ['sender' => '1000']);
     }
 
-    public function test_invalid_response_structure_exception()
+    public function test_invalid_response_structure_exception(): void
     {
         Http::fake([
             'https://api2.ippanel.com/api/v1/sms/send/webservice/single' => Http::response([
                 'unexpected' => 'response'
-            ], 200)
+            ])
         ]);
 
         $this->expectException(SendingSmsFailedException::class);
@@ -75,10 +76,16 @@ public function test_invalid_response_structure_exception()
         $this->farazSms->send('09123456789', 'Test message', ['sender' => '1000']);
     }
 
-    public function test_missing_sender_option_leads_to_exception()
+    public function test_missing_sender_option_leads_to_exception(): void
     {
+        config([
+            'sms.faraz_sms.default_sender' => '',
+        ]);
+
+        $this->farazSms = new FarazSms(config('sms.faraz_sms'));
+
         $this->expectException(\Omalizadeh\Sms\Exceptions\InvalidParameterException::class);
-        $this->expectExceptionMessage('sender parameter is required.');
+        $this->expectExceptionMessage('sender parameter is required for Faraz sms driver.');
 
         $this->farazSms->send('09123456789', 'Test message');
     }