diff --git a/src/helper.php b/src/helper.php
index dfeb099c09..67244a53ac 100644
--- a/src/helper.php
+++ b/src/helper.php
@@ -209,10 +209,10 @@ function dump(...$vars)
      * 获取环境变量值
      * @access public
      * @param string $name    环境变量名（支持二级 .号分割）
-     * @param string $default 默认值
+     * @param mixed $default 默认值
      * @return mixed
      */
-    function env(?string $name = null, $default = null)
+    function env(?string $name = null, mixed $default = null)
     {
         return Env::get($name, $default);
     }
diff --git a/src/think/Env.php b/src/think/Env.php
index 91e54a531e..47695f9d6e 100644
--- a/src/think/Env.php
+++ b/src/think/Env.php
@@ -61,7 +61,7 @@ public function load(string $file): void
      * @param mixed  $default 默认值
      * @return mixed
      */
-    public function get(?string $name = null, $default = null)
+    public function get(?string $name = null, mixed $default = null)
     {
         if (is_null($name)) {
             return $this->data;
@@ -81,7 +81,7 @@ public function get(?string $name = null, $default = null)
         return $this->getEnv($name, $default);
     }
 
-    protected function getEnv(string $name, $default = null)
+    protected function getEnv(string $name, mixed $default = null)
     {
         $result = getenv('PHP_' . $name);