diff --git a/composer.json b/composer.json
index 8cdf0fd9c..f3eee609a 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
     },
     "require": {
         "php": ">=5.3.2",
-        "justinrainbow/json-schema": "~1.3",
+        "justinrainbow/json-schema": "~1.4",
         "seld/jsonlint": "~1.0",
         "symfony/console": "~2.5",
         "symfony/finder": "~2.2",