diff --git a/composer.json b/composer.json
index 4b8fa2e..0c404d7 100644
--- a/composer.json
+++ b/composer.json
@@ -25,11 +25,10 @@
     }
   },
   "require": {
-    "php": "^5.5 || ^7.0",
+    "php": "^5.5 || ^7.0 || ^8.0",
     "ext-json": "*"
   },
   "require-dev": {
-    "phpunit/phpunit": "~6.5.0",
     "symfony/yaml": "^4.2",
     "donatj/mock-webserver": "^2.0",
     "overtrue/phplint": "^1.1",