diff --git a/composer.json b/composer.json
index 84456fdbf..b9fd48f4b 100644
--- a/composer.json
+++ b/composer.json
@@ -10,6 +10,7 @@
     "type": "project",
     "require": {
         "php": ">=5.4",
+        "ext-mbstring": "*",
         "ext-mcrypt": "*",
         "ext-openssl": "*",
         "laravel/framework": "4.2.*",