diff --git a/package.json b/package.json
index ce88c7422..0c3fa3643 100644
--- a/package.json
+++ b/package.json
@@ -57,6 +57,7 @@
     "bluebird": "^3.5.0",
     "browser-request": "^0.3.3",
     "content-type": "^1.0.2",
+    "memfs": "^2.10.1",
     "request": "^2.88.0"
   },
   "devDependencies": {