diff --git a/composer.json b/composer.json
index f58c6e6..779a7c6 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
     "require": {
         "phpunit/phpunit": "^7.1",
         "phpunit/php-code-coverage": "^6.0",
-        "sebastian/comparator": "^2.0",
+        "sebastian/comparator": "^3.0",
         "sebastian/diff": "^3.0"
     },
     "autoload":{