diff --git a/src/Validator/BindForm.php b/src/Validator/BindForm.php
index 98cca76..5ee05a9 100644
--- a/src/Validator/BindForm.php
+++ b/src/Validator/BindForm.php
@@ -13,6 +13,7 @@ use Kiri\Router\Validator\Types\IntProxy;
 use Kiri\Router\Validator\Types\MixedProxy;
 use Kiri\Router\Validator\Types\StringProxy;
 use Kiri\Router\Validator\Types\TypesProxy;
+use Kiri\Server\ServerInterface;
 use ReflectionNamedType;
 use ReflectionUnionType;
 
@@ -52,7 +53,7 @@ class BindForm implements InjectParameterInterface
                 }
             }
 
-            $typeProxy        = $this->_typeValidator($property);
+            $typeProxy = $this->_typeValidator($property);
             $validator->addRule($property->getName(), [$typeProxy, false]);
         }
 
@@ -72,28 +73,32 @@ class BindForm implements InjectParameterInterface
     private function _typeValidator(\ReflectionProperty $property): TypesProxy
     {
         $getType = $property->getType();
-        $array   = ['allowsNull' => $property->getType()->allowsNull()];
+        if (is_null($getType)) {
+            $service = \Kiri::getDi();
+            if ($service->has(ServerInterface::class)) {
+                $service->get(ServerInterface::class)->shutdown();
+            }
+            throw new Exception('Field ' . $property->getDeclaringClass()->getName() . '::' . $property->getName() . ' must have a numerical type set.');
+        }
+        $array = ['allowsNull' => $property->getType()->allowsNull()];
         if (!$getType instanceof ReflectionUnionType) {
-            return \Kiri::createObject(array_merge($array, [
-                'class' => $this->_typeProxy($getType)
-            ]));
+            $array = array_merge($array, ['class' => $this->_typeProxy($getType)]);
+        } else {
+            $types = [];
+            foreach ($getType->getTypes() as $type) {
+                $types[] = $type->getName();
+            }
+            $array = array_merge($array, ['types' => $types, 'class' => MixedProxy::class]);
         }
-        $types = [];
-        foreach ($getType->getTypes() as $type) {
-            $types[] = $type->getName();
-        }
-        return \Kiri::createObject(array_merge($array, [
-            'types' => $types,
-            'class' => MixedProxy::class
-        ]));
+        return \Kiri::createObject($array);
     }
 
 
     /**
      * @param ReflectionNamedType $type
-     * @return string
+     * @return string|null
      */
-    private function _typeProxy(ReflectionNamedType $type): string
+    private function _typeProxy(ReflectionNamedType $type): ?string
     {
         return match ($type->getName()) {
             'array'  => ArrayProxy::class,
@@ -101,6 +106,7 @@ class BindForm implements InjectParameterInterface
             'float'  => FloatProxy::class,
             'int'    => IntProxy::class,
             'string' => StringProxy::class,
+            default  => null
         };
     }
 
diff --git a/src/Validator/Validator.php b/src/Validator/Validator.php
index 57aa09b..9bffa6e 100644
--- a/src/Validator/Validator.php
+++ b/src/Validator/Validator.php
@@ -82,7 +82,8 @@ class Validator
             $this->rules[$name] = [];
         }
         foreach ($rule as $item) {
-            [$dispatch, $isFirst] = $item;
+            $isFirst  = array_pop($item);
+            $dispatch = count($item) > 1 ? $item : [$item[0], 'dispatch'];
             if ($isFirst) {
                 array_unshift($this->rules[$name], $dispatch);
             } else {
@@ -104,24 +105,25 @@ class Validator
         }
         $params = !$request->isPost() ? $request->getQueryParams() : $request->getParsedBody();
         foreach ($this->rules as $name => $rules) {
-            /** @var TypesProxy $typeValidator */
+            /** @var array<array<TypesProxy,string>> $typeValidator */
+            $typeValidator = array_pop($rules);
             if (!isset($params[$name])) {
                 if ($rules[0] instanceof RequiredValidatorFilter) {
                     return $this->addError('The request field ' . $name . ' is mandatory and indispensable');
                 }
-                if (!$typeValidator->allowsNull) {
+                if (!$typeValidator[0]->allowsNull) {
                     return $this->addError('The request field ' . $name . ' parameter cannot be null');
                 }
+                $params[$name] = null;
             }
 
-            $typeValidator = array_pop($rules);
-            if (!$typeValidator->dispatch($this->formData, $name, $params[$name])) {
+            if (!call_user_func($typeValidator, $this->formData, $name, $params[$name])) {
                 return $this->addError('The parameter type used in the request field ' . $name . ' is incorrect');
             }
 
-            /** @var RValidator $rule */
+            /** @var array $rule */
             foreach ($rules as $rule) {
-                if (!$rule->dispatch($this->formData->{$name})) {
+                if (!call_user_func($rule, $this->formData->{$name})) {
                     return $this->addError('Request field ' . $name . ' value format error');
                 }
             }