diff --git a/src/Bundle.php b/src/Bundle.php
index 81b968d..5f60269 100644
--- a/src/Bundle.php
+++ b/src/Bundle.php
@@ -15,7 +15,5 @@
  */
 class Bundle extends BaseBundle
 {
-
     protected $name = 'PHPVietValidationBundle';
-
 }
diff --git a/src/Constraints/IdVNValidator.php b/src/Constraints/IdVNValidator.php
index a611d29..edf0224 100644
--- a/src/Constraints/IdVNValidator.php
+++ b/src/Constraints/IdVNValidator.php
@@ -7,9 +7,9 @@
 
 namespace PHPViet\Symfony\Validation\Constraints;
 
-use PHPViet\Validation\Validator as ConcreteValidator;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\ConstraintValidator;
+use PHPViet\Validation\Validator as ConcreteValidator;
 use Symfony\Component\Validator\Exception\UnexpectedTypeException;
 
 /**
@@ -18,13 +18,12 @@
  */
 class IdVNValidator extends ConstraintValidator
 {
-
     /**
      * {@inheritdoc}
      */
     public function validate($value, Constraint $constraint): void
     {
-        if (!$constraint instanceof IdVN) {
+        if (! $constraint instanceof IdVN) {
             throw new UnexpectedTypeException($constraint, IdVN::class);
         }
 
@@ -35,5 +34,4 @@ public function validate($value, Constraint $constraint): void
                 ->addViolation();
         }
     }
-
 }
diff --git a/src/Constraints/IpVNValidator.php b/src/Constraints/IpVNValidator.php
index 5b58130..600754b 100644
--- a/src/Constraints/IpVNValidator.php
+++ b/src/Constraints/IpVNValidator.php
@@ -7,9 +7,9 @@
 
 namespace PHPViet\Symfony\Validation\Constraints;
 
-use PHPViet\Validation\Validator as ConcreteValidator;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\ConstraintValidator;
+use PHPViet\Validation\Validator as ConcreteValidator;
 use Symfony\Component\Validator\Exception\UnexpectedTypeException;
 
 /**
@@ -18,13 +18,12 @@
  */
 class IpVNValidator extends ConstraintValidator
 {
-
     /**
      * {@inheritdoc}
      */
     public function validate($value, Constraint $constraint): void
     {
-        if (!$constraint instanceof IpVN) {
+        if (! $constraint instanceof IpVN) {
             throw new UnexpectedTypeException($constraint, IpVN::class);
         }
 
@@ -47,5 +46,4 @@ protected function getCode(?int $ipVersion): string
                 return IpVN::IP_VN_ERROR;
         }
     }
-
 }
diff --git a/src/Constraints/LandLineVNValidator.php b/src/Constraints/LandLineVNValidator.php
index 0cbf5b3..33e2a4d 100644
--- a/src/Constraints/LandLineVNValidator.php
+++ b/src/Constraints/LandLineVNValidator.php
@@ -7,9 +7,9 @@
 
 namespace PHPViet\Symfony\Validation\Constraints;
 
-use PHPViet\Validation\Validator as ConcreteValidator;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\ConstraintValidator;
+use PHPViet\Validation\Validator as ConcreteValidator;
 use Symfony\Component\Validator\Exception\UnexpectedTypeException;
 
 /**
@@ -18,13 +18,12 @@
  */
 class LandLineVNValidator extends ConstraintValidator
 {
-
     /**
      * {@inheritdoc}
      */
     public function validate($value, Constraint $constraint): void
     {
-        if (!$constraint instanceof LandLineVN) {
+        if (! $constraint instanceof LandLineVN) {
             throw new UnexpectedTypeException($constraint, LandLineVN::class);
         }
 
@@ -35,5 +34,4 @@ public function validate($value, Constraint $constraint): void
                 ->addViolation();
         }
     }
-
 }
diff --git a/src/Constraints/MobileVNValidator.php b/src/Constraints/MobileVNValidator.php
index 3d0b68b..f5fb352 100644
--- a/src/Constraints/MobileVNValidator.php
+++ b/src/Constraints/MobileVNValidator.php
@@ -7,9 +7,9 @@
 
 namespace PHPViet\Symfony\Validation\Constraints;
 
-use PHPViet\Validation\Validator as ConcreteValidator;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\ConstraintValidator;
+use PHPViet\Validation\Validator as ConcreteValidator;
 use Symfony\Component\Validator\Exception\UnexpectedTypeException;
 
 /**
@@ -18,13 +18,12 @@
  */
 class MobileVNValidator extends ConstraintValidator
 {
-
     /**
      * {@inheritdoc}
      */
     public function validate($value, Constraint $constraint): void
     {
-        if (!$constraint instanceof MobileVN) {
+        if (! $constraint instanceof MobileVN) {
             throw new UnexpectedTypeException($constraint, MobileVN::class);
         }
 
@@ -35,5 +34,4 @@ public function validate($value, Constraint $constraint): void
                 ->addViolation();
         }
     }
-
 }
diff --git a/tests/Constraints/IdVNTest.php b/tests/Constraints/IdVNTest.php
index ffe6fd1..843f54e 100644
--- a/tests/Constraints/IdVNTest.php
+++ b/tests/Constraints/IdVNTest.php
@@ -16,7 +16,6 @@
  */
 class IdVNTest extends TestCase
 {
-
     public function testValid()
     {
         $this->context->expects($this->never())->method('buildViolation');
@@ -37,6 +36,4 @@ protected function getValidatorClass(): string
     {
         return IdVNValidator::class;
     }
-
-
 }
diff --git a/tests/Constraints/IpVNTest.php b/tests/Constraints/IpVNTest.php
index 0fad93d..32d7dba 100644
--- a/tests/Constraints/IpVNTest.php
+++ b/tests/Constraints/IpVNTest.php
@@ -16,7 +16,6 @@
  */
 class IpVNTest extends TestCase
 {
-
     public function testValid(): void
     {
         $this->context->expects($this->never())->method('buildViolation');
diff --git a/tests/Constraints/LandLineVNTest.php b/tests/Constraints/LandLineVNTest.php
index 511df46..c88b4bd 100644
--- a/tests/Constraints/LandLineVNTest.php
+++ b/tests/Constraints/LandLineVNTest.php
@@ -36,5 +36,4 @@ protected function getValidatorClass(): string
     {
         return LandLineVNValidator::class;
     }
-
 }
diff --git a/tests/Constraints/MobileVNTest.php b/tests/Constraints/MobileVNTest.php
index 4d5252b..831e863 100644
--- a/tests/Constraints/MobileVNTest.php
+++ b/tests/Constraints/MobileVNTest.php
@@ -16,7 +16,6 @@
  */
 class MobileVNTest extends TestCase
 {
-
     public function testValid()
     {
         $this->context->expects($this->never())->method('buildViolation');
@@ -37,5 +36,4 @@ protected function getValidatorClass(): string
     {
         return MobileVNValidator::class;
     }
-
 }
diff --git a/tests/Constraints/TestCase.php b/tests/Constraints/TestCase.php
index 227a36f..dc84c58 100644
--- a/tests/Constraints/TestCase.php
+++ b/tests/Constraints/TestCase.php
@@ -15,7 +15,6 @@
  */
 abstract class TestCase extends BaseTestCase
 {
-
     /**
      * @var \Symfony\Component\Validator\Context\ExecutionContextInterface|\PHPUnit_Framework_MockObject_MockObject
      */
@@ -46,5 +45,4 @@ protected function getConstraintsViolationBuilder()
     }
 
     abstract protected function getValidatorClass(): string;
-
 }