diff --git a/src/Captcha.php b/src/Captcha.php
index f45097b..e3e687c 100644
--- a/src/Captcha.php
+++ b/src/Captcha.php
@@ -235,7 +235,9 @@ class Captcha
         // 输出图像
         imagepng($this->im);
         $content = ob_get_clean();
-        imagedestroy($this->im);
+        if (PHP_VERSION_ID < 80000) {
+            imagedestroy($this->im);
+        }
 
         return response($content, 200, ['Content-Length' => strlen($content)])->contentType('image/png');
     }
@@ -338,7 +340,9 @@ class Captcha
         // Resample
         $bgImage = @imagecreatefromjpeg($gb);
         @imagecopyresampled($this->im, $bgImage, 0, 0, 0, 0, $this->imageW, $this->imageH, $width, $height);
-        @imagedestroy($bgImage);
+        if (PHP_VERSION_ID < 80000) {
+            @imagedestroy($bgImage);
+        }
     }
 
     /* 加密验证码 */