transition to latest yang-js/yang-express, introduce additional xos-core models for service-attribute, xos-base, provider, service, and tenancy
diff --git a/package.json b/package.json
index 59bc85e..d72531f 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": "^0.3.11",
-    "yang-js": "^0.15.21"
+    "yang-express": "^0.3.15",
+    "yang-js": "^0.15.25"
   },
   "optionalDependencies": {
     "corenova": "^1.0.0"