diff --git a/src/Generators/RequestsGenerator.php b/src/Generators/RequestsGenerator.php
index 504b222..c0b566d 100644
--- a/src/Generators/RequestsGenerator.php
+++ b/src/Generators/RequestsGenerator.php
@@ -76,6 +76,7 @@ protected function createRequest($method, $needToValidate = true, $parameters =
             'namespace' => $this->getNamespace('requests'),
             'servicesNamespace' => $this->getNamespace('services'),
             'entityNamespace' => $this->getModelClass($this->model),
+            'needToValidateWith' => !is_null(Arr::first($parameters, fn ($parameter) => $parameter['name'] === 'with.*')),
         ]);
 
         $this->saveClass('requests', "{$method}{$modelName}Request",
@@ -195,7 +196,7 @@ protected function getRules($name, $type, $required, $nullable, $present): array
             $rules[] = 'present';
         }
 
-        if ($name === 'order_by') {
+        if (in_array($name, ['order_by', 'with.*'])) {
             $rules[] = 'in:';
         }
 
diff --git a/stubs/request.blade.php b/stubs/request.blade.php
index bb8fb4b..bde5819 100644
--- a/stubs/request.blade.php
+++ b/stubs/request.blade.php
@@ -16,9 +16,13 @@ class {{ $method }}{{ $entity }}Request extends Request
     public function rules(): array
     {
 @if(!empty($parameters))
+@if($needToValidateWith)
+        $availableRelations = implode(',', $this->getAvailableRelations());
+
+@endif
         return [
 @foreach($parameters as $parameter)
-            '{{ $parameter['name'] }}' => '{!! implode('|', $parameter['rules']) !!}'@if ($parameter['name'] === 'order_by') . $this->getOrderableFields({{ Str::singular($entity) }}::class)@endif,
+            '{{ $parameter['name'] }}' => '{!! implode('|', $parameter['rules']) !!}'@if ($parameter['name'] === 'order_by') . $this->getOrderableFields({{ Str::singular($entity) }}::class)@elseif($parameter['name'] === 'with.*'){{ ' . $availableRelations' }}@endif,
 @endforeach
         ];
 @else
@@ -41,4 +45,13 @@ public function validateResolved(): void
         }
     }
 @endif
+@if($needToValidateWith)
+
+    //TODO: don't forget to review relations list
+    protected function getAvailableRelations(): array
+    {
+        return [
+        ];
+    }
+@endif
 }
\ No newline at end of file
diff --git a/tests/fixtures/CommandTest/get_request.php b/tests/fixtures/CommandTest/get_request.php
index 4440a22..0f3e2bd 100644
--- a/tests/fixtures/CommandTest/get_request.php
+++ b/tests/fixtures/CommandTest/get_request.php
@@ -10,9 +10,11 @@ class GetPostRequest extends Request
 {
     public function rules(): array
     {
+        $availableRelations = implode(',', $this->getAvailableRelations());
+
         return [
             'with' => 'array',
-            'with.*' => 'string|required',
+            'with.*' => 'string|required|in:' . $availableRelations,
         ];
     }
 
@@ -26,4 +28,11 @@ public function validateResolved(): void
             throw new NotFoundHttpException(__('validation.exceptions.not_found', ['entity' => 'Post']));
         }
     }
+
+    //TODO: don't forget to review relations list
+    protected function getAvailableRelations(): array
+    {
+        return [
+        ];
+    }
 }
\ No newline at end of file
diff --git a/tests/fixtures/CommandTest/search_request.php b/tests/fixtures/CommandTest/search_request.php
index 1009682..a6c6c80 100644
--- a/tests/fixtures/CommandTest/search_request.php
+++ b/tests/fixtures/CommandTest/search_request.php
@@ -9,6 +9,8 @@ class SearchPostsRequest extends Request
 {
     public function rules(): array
     {
+        $availableRelations = implode(',', $this->getAvailableRelations());
+
         return [
             'page' => 'integer',
             'per_page' => 'integer',
@@ -17,7 +19,14 @@ public function rules(): array
             'all' => 'boolean',
             'with' => 'array',
             'query' => 'string|nullable',
-            'with.*' => 'string',
+            'with.*' => 'string|in:' . $availableRelations,
+        ];
+    }
+
+    //TODO: don't forget to review relations list
+    protected function getAvailableRelations(): array
+    {
+        return [
         ];
     }
 }
\ No newline at end of file
diff --git a/tests/fixtures/CommandTest/search_request_subfolder_model.php b/tests/fixtures/CommandTest/search_request_subfolder_model.php
index 39db73e..ff7dc4e 100644
--- a/tests/fixtures/CommandTest/search_request_subfolder_model.php
+++ b/tests/fixtures/CommandTest/search_request_subfolder_model.php
@@ -9,6 +9,8 @@ class SearchPostsRequest extends Request
 {
     public function rules(): array
     {
+        $availableRelations = implode(',', $this->getAvailableRelations());
+
         return [
             'page' => 'integer',
             'per_page' => 'integer',
@@ -17,7 +19,14 @@ public function rules(): array
             'all' => 'boolean',
             'with' => 'array',
             'query' => 'string|nullable',
-            'with.*' => 'string',
+            'with.*' => 'string|in:' . $availableRelations,
+        ];
+    }
+
+    //TODO: don't forget to review relations list
+    protected function getAvailableRelations(): array
+    {
+        return [
         ];
     }
 }
\ No newline at end of file
diff --git a/tests/fixtures/RequestGeneratorTest/get_request.php b/tests/fixtures/RequestGeneratorTest/get_request.php
index 4440a22..0f3e2bd 100644
--- a/tests/fixtures/RequestGeneratorTest/get_request.php
+++ b/tests/fixtures/RequestGeneratorTest/get_request.php
@@ -10,9 +10,11 @@ class GetPostRequest extends Request
 {
     public function rules(): array
     {
+        $availableRelations = implode(',', $this->getAvailableRelations());
+
         return [
             'with' => 'array',
-            'with.*' => 'string|required',
+            'with.*' => 'string|required|in:' . $availableRelations,
         ];
     }
 
@@ -26,4 +28,11 @@ public function validateResolved(): void
             throw new NotFoundHttpException(__('validation.exceptions.not_found', ['entity' => 'Post']));
         }
     }
+
+    //TODO: don't forget to review relations list
+    protected function getAvailableRelations(): array
+    {
+        return [
+        ];
+    }
 }
\ No newline at end of file
diff --git a/tests/fixtures/RequestGeneratorTest/search_request.php b/tests/fixtures/RequestGeneratorTest/search_request.php
index 580a4f1..7e76ce9 100644
--- a/tests/fixtures/RequestGeneratorTest/search_request.php
+++ b/tests/fixtures/RequestGeneratorTest/search_request.php
@@ -9,6 +9,8 @@ class SearchPostsRequest extends Request
 {
     public function rules(): array
     {
+        $availableRelations = implode(',', $this->getAvailableRelations());
+
         return [
             'user_id' => 'integer|exists:users,id|required',
             'page' => 'integer',
@@ -19,7 +21,14 @@ public function rules(): array
             'with' => 'array',
             'order_by' => 'string|in:' . $this->getOrderableFields(Post::class),
             'query' => 'string|nullable',
-            'with.*' => 'string',
+            'with.*' => 'string|in:' . $availableRelations,
+        ];
+    }
+
+    //TODO: don't forget to review relations list
+    protected function getAvailableRelations(): array
+    {
+        return [
         ];
     }
 }
\ No newline at end of file