diff --git a/composer.json b/composer.json
index 09733e0..68a09af 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
         }
     ],
     "require-dev": {
-        "phpspec/phpspec": "^3.0|^7.0",
+        "phpspec/phpspec": "^3.0|^7.0|^8.0",
         "php-vfs/php-vfs": "~1.2"
     },
     "require": {