diff --git a/src/Application/Usecase/Employees/Find/FindEmployee.php b/src/Application/Usecase/Employees/Find/FindEmployee.php
index 57dab15..82424bf 100644
--- a/src/Application/Usecase/Employees/Find/FindEmployee.php
+++ b/src/Application/Usecase/Employees/Find/FindEmployee.php
@@ -8,6 +8,7 @@ use Domain\Exceptions\NotFoundException;
 use Domain\Ports\Directories\EmployeeDirectory;
 use Shared\DDD\Usecase\Input as BaseInput;
 use Shared\DDD\Usecase\Usecase;
+use Webmozart\Assert\Assert;
 
 /** @implements Usecase<\Shared\DDD\Usecase\Input, \Shared\DDD\Usecase\Output> */
 final readonly class FindEmployee implements Usecase
@@ -20,7 +21,7 @@ final readonly class FindEmployee implements Usecase
     #[\Override]
     public function execute(BaseInput $input): Output
     {
-        assert($input instanceof Input);
+        Assert::isInstanceOf($input, Input::class);
 
         $employee = $this->directory->find($input->id);
 
diff --git a/src/Application/Usecase/Employees/FindAll/FindAllEmployees.php b/src/Application/Usecase/Employees/FindAll/FindAllEmployees.php
index 6e91bfa..21f2312 100644
--- a/src/Application/Usecase/Employees/FindAll/FindAllEmployees.php
+++ b/src/Application/Usecase/Employees/FindAll/FindAllEmployees.php
@@ -9,6 +9,7 @@ use Domain\Ports\Directories\EmployeeDirectory;
 use Shared\DDD\Usecase\Input as BaseInput;
 use Shared\DDD\Usecase\Usecase;
 use Shared\Paginated;
+use Webmozart\Assert\Assert;
 
 /** @implements Usecase<\Shared\DDD\Usecase\Input, \Shared\DDD\Usecase\Output> */
 final readonly class FindAllEmployees implements Usecase
@@ -21,7 +22,7 @@ final readonly class FindAllEmployees implements Usecase
     #[\Override]
     public function execute(BaseInput $input): Output
     {
-        assert($input instanceof Input);
+        Assert::isInstanceOf($input, Input::class);
 
         $page = $this->directory->findAll(
             $input->pagination,
diff --git a/src/Application/Usecase/Employees/FindAll/Output.php b/src/Application/Usecase/Employees/FindAll/Output.php
index 530d33e..a569d95 100644
--- a/src/Application/Usecase/Employees/FindAll/Output.php
+++ b/src/Application/Usecase/Employees/FindAll/Output.php
@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace Application\Usecase\Employees\FindAll;
 
 use Shared\DDD\Usecase\Output as UsecaseOutput;
+use Webmozart\Assert\Assert;
 
 final readonly class Output implements UsecaseOutput
 {
@@ -16,7 +17,7 @@ final readonly class Output implements UsecaseOutput
         public int $perPage = 10,
     ) {
         foreach ($this->employees as $employee) {
-            assert($employee instanceof PaginatedEmployee);
+            Assert::isInstanceOf($employee, PaginatedEmployee::class);
         }
     }
 }
diff --git a/tests/Architecture/CodingStandardsTest.php b/tests/Architecture/CodingStandardsTest.php
index a6b3e92..8e67f7a 100644
--- a/tests/Architecture/CodingStandardsTest.php
+++ b/tests/Architecture/CodingStandardsTest.php
@@ -4,8 +4,12 @@ declare(strict_types=1);
 
 describe('Coding Standards & Project Rules', function (): void {
     arch()->preset()->php();
-    // assert(bool) est intentionnel pour le type narrowing PHPStan, seul assert(string) est dangereux (deprecated PHP 8.3)
-    arch()->preset()->security()->ignoring('assert');
+    // Le helper assert natif est interdit en faveur de Webmozart\Assert
+    arch()->preset()->security();
+
+    arch('assert is not used in src (use Webmozart\Assert instead)')
+        ->expect('assert')
+        ->not->toBeUsed();
 
     arch('config() helper is not used in src (use Config facade instead)')
         ->expect('config')