diff --git a/appengine/mongodb/package.json b/appengine/mongodb/package.json
index 1c5716e745..9e3a03f5a8 100644
--- a/appengine/mongodb/package.json
+++ b/appengine/mongodb/package.json
@@ -30,7 +30,7 @@
   },
   "dependencies": {
     "mongodb": "3.1.10",
-    "nconf": "0.10.0"
+    "nconf": "0.12.0"
   },
   "devDependencies": {
     "@google-cloud/nodejs-repo-tools": "^3.0.0"