diff --git a/composer.json b/composer.json
index a9184092..2433e385 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
         "icecave/parity": "1.0.0"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "~2.2.20||~2.15.1",
+        "friendsofphp/php-cs-fixer": "~2.2.20 || ^2.15.1",
         "json-schema/json-schema-test-suite": "1.2.0",
         "phpunit/phpunit": "^4.8.35"
     },