diff --git a/.nvmrc b/.nvmrc
index 7ed6ff82de..1e8b314962 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-5
+6
diff --git a/.travis.yml b/.travis.yml
index 7a87796437..b30e5d12a1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ dist: trusty
 sudo: required
 language: node_js
 node_js:
-  - "5"
+  - "6"
 os:
   - linux
 env:
diff --git a/package.json b/package.json
index c56e0d3dbf..f8ece4dacf 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "gulp-tslint": "^5.0.0",
     "gulp-util": "^3.0.6",
     "gulp-watch": "^4.3.4",
-    "harp": "^0.20.3",
+    "harp": "0.21.0-pre.0",
     "html2jade": "^0.8.4",
     "indent-string": "^2.1.0",
     "jasmine-core": "^2.3.4",