diff --git a/composer.json b/composer.json
index cd9ef92..323cac5 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
     "license": "MIT",
     "require": {
         "php": ">=5.3.3",
-        "phpspec/phpspec": "~3.0|~4.0|~5.0",
+        "phpspec/phpspec": "~3.0|~4.0|~5.0|~6.0",
         "whatthejeff/nyancat-scoreboard": "~1.1"
     },
     "autoload": {