upgrade to latest yang-js/yang-express
diff --git a/package.json b/package.json
index 60a7266..c3d7da4 100644
--- a/package.json
+++ b/package.json
@@ -32,8 +32,8 @@
     "minimist": "^1.2.0",
     "node-uuid": "^1.4.7",
     "superagent": "^2.0.0",
-    "yang-express": "^0.3.5",
-    "yang-js": "^0.15.13"
+    "yang-express": "^0.3.7",
+    "yang-js": "^0.15.15"
   },
   "optionalDependencies": {
     "corenova": "^1.0.0"