diff --git a/composer.json b/composer.json
index 5b67a9626..3c29600a4 100644
--- a/composer.json
+++ b/composer.json
@@ -23,6 +23,7 @@
 	"require": {
 		"php":                ">=5.3.2",
 		"ext-curl":           "*",
+		"ext-xml":            "*",
 		"kriswallsmith/buzz": ">=0.7"
 	},
 	"require-dev": {