diff --git a/config/orion.php b/config/orion.php
index f9898fa0..5b696766 100644
--- a/config/orion.php
+++ b/config/orion.php
@@ -3,10 +3,10 @@
 return [
     'namespaces' => [
         'models' => 'App\\Models\\',
-        'controllers' => 'App\\Http\\Controllers\\'
+        'controllers' => 'App\\Http\\Controllers\\',
     ],
     'auth' => [
-        'guard' => 'api'
+        'guard' => 'api',
     ],
     'specs' => [
         'info' => [
@@ -27,26 +27,26 @@
         'servers' => [
             ['url' => env('APP_URL').'/api', 'description' => 'Default Environment'],
         ],
-        'tags' => []
+        'tags' => [],
     ],
     'transactions' => [
         'enabled' => false,
     ],
     'search' => [
         'case_sensitive' => true, // TODO: set to "false" by default in 3.0 release
-            /*
-            |--------------------------------------------------------------------------
-            | Max Nested Depth
-            |--------------------------------------------------------------------------
-            |
-            | This value is the maximum depth of nested filters
-            | you will most likely need this to be maximum at 1 but
-            | you can increase this number if necessary. Please
-            | be aware that the depth generate dynamic rules and can slow
-            | your application if someone sends a request with thousands of nested
-            | filters.
-            |
-            */
-        'max_nested_depth' => 1
+        /*
+         |--------------------------------------------------------------------------
+         | Max Nested Depth
+         |--------------------------------------------------------------------------
+         |
+         | This value is the maximum depth of nested filters.
+         | You will most likely need this to be maximum at 1, but
+         | you can increase this number, if necessary. Please
+         | be aware that the depth generate dynamic rules and can slow
+         | your application if someone sends a request with thousands of nested
+         | filters.
+         |
+         */
+        'max_nested_depth' => 1,
     ],
 ];
diff --git a/src/Drivers/Standard/ParamsValidator.php b/src/Drivers/Standard/ParamsValidator.php
index ed553b94..29d46b9d 100644
--- a/src/Drivers/Standard/ParamsValidator.php
+++ b/src/Drivers/Standard/ParamsValidator.php
@@ -47,20 +47,32 @@ public function validateScopes(Request $request): void
 
     public function validateFilters(Request $request): void
     {
-        $max_depth = floor($this->getArrayDepth($request->all()['filters']) / 2);
-        $config_max_nested_depth = config('orion.search.max_nested_depth', 1);
+        $maxDepth = floor($this->getArrayDepth($request->all()['filters']) / 2);
+        $configMaxNestedDepth = config('orion.search.max_nested_depth', 1);
 
-        abort_if($max_depth > $config_max_nested_depth, 422, __('Max nested depth :depth is exceeded', ['depth' => $config_max_nested_depth]));
+        abort_if(
+            $maxDepth > $configMaxNestedDepth,
+            422,
+            __('Max nested depth :depth is exceeded', ['depth' => $configMaxNestedDepth])
+        );
 
         Validator::make(
             $request->all(),
             array_merge([
                 'filters' => ['sometimes', 'array'],
-            ], $this->getNestedRules('filters', $max_depth))
+            ], $this->getNestedRules('filters', $maxDepth))
         )->validate();
     }
 
-    protected function getNestedRules($prefix, $max_depth, $rules = [], $current_depth = 1) {
+    /**
+     * @param string $prefix
+     * @param int $maxDepth
+     * @param array $rules
+     * @param int $currentDepth
+     * @return array
+     */
+    protected function getNestedRules(string $prefix, int $maxDepth, array $rules = [], int $currentDepth = 1): array
+    {
         $rules = array_merge($rules, [
             $prefix.'.*.type' => ['sometimes', 'in:and,or'],
             $prefix.'.*.field' => [
@@ -73,28 +85,32 @@ protected function getNestedRules($prefix, $max_depth, $rules = [], $current_dep
                 'in:<,<=,>,>=,=,!=,like,not like,ilike,not ilike,in,not in,all in,any in',
             ],
             $prefix.'.*.value' => ['nullable'],
-            $prefix.'.*.nested' => ['sometimes', 'array', "prohibits:{$prefix}.*.operator,{$prefix}.*.value,{$prefix}.*.field"],
+            $prefix.'.*.nested' => ['sometimes', 'array',],
         ]);
 
-        if ($max_depth >= $current_depth) {
-            $rules = array_merge($rules, $this->getNestedRules("{$prefix}.*.nested", $max_depth, $rules, ++$current_depth));
+        if ($maxDepth >= $currentDepth) {
+            $rules = array_merge(
+                $rules,
+                $this->getNestedRules("{$prefix}.*.nested", $maxDepth, $rules, ++$currentDepth)
+            );
         }
 
         return $rules;
     }
 
-    protected function getArrayDepth($array) {
-        $max_depth = 0;
+    protected function getArrayDepth($array): int
+    {
+        $maxDepth = 0;
 
         foreach ($array as $value) {
             if (is_array($value)) {
                 $depth = $this->getArrayDepth($value) + 1;
 
-                $max_depth = max($depth, $max_depth);
+                $maxDepth = max($depth, $maxDepth);
             }
         }
 
-        return $max_depth;
+        return $maxDepth;
     }
 
     public function validateSort(Request $request): void