diff --git a/composer.json b/composer.json
index 90d2576f..95a89919 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,8 @@
     "require": {
         "php": ">=5.5.0",
         "ext-ctype": "*",
-        "ext-filter": "*"
+        "ext-filter": "*",
+        "ext-hash": "*"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.2",