diff --git a/composer.json b/composer.json
index c57ff4d3..4ae87be6 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
     "php": "5.5 - 8.0"
   },
   "require-dev": {
-    "php": "5.5 - 8.0",
+    "php": "5.5 - 8.1",
     "phpunit/phpunit": "5.* || 8.*",
     "php-coveralls/php-coveralls": "2.*",
     "squizlabs/php_codesniffer": "3.*",