diff --git a/package.json b/package.json
index 52afb97..2ae2030 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
     "iniparser": "~1.0.5",
     "base64-xor": "~0.10.0",
     "request": "~2.60.0",
-    "mathjs": "~1.7.1"
+    "mathjs": "~1.7.1",
+    "xml": "~1.0.0"
   }
 }