diff --git a/.eslintrc.yml b/.eslintrc.yml
index ddf32bc..8890824 100644
--- a/.eslintrc.yml
+++ b/.eslintrc.yml
@@ -1,6 +1,7 @@
 env:
   node:     true
   browser:  true
+  es6:      false
 
 rules:
   accessor-pairs:         2
diff --git a/.travis.yml b/.travis.yml
index 12732b4..94f3b19 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,4 @@
 language: node_js
 node_js:
- - stable
+ - 6
 sudo: false
diff --git a/package.json b/package.json
index 781a1dc..41815d8 100644
--- a/package.json
+++ b/package.json
@@ -12,10 +12,11 @@
   "repository": "nodeca/bag.js",
   "license": "MIT",
   "devDependencies": {
-    "eslint": "2.0.0-rc.0",
-    "mocha": "^2.2.5",
+    "eslint": "^3.9.1",
+    "lie": "^3.1.0",
+    "mocha": "^3.1.2",
     "mocha-browser": "~ 0.2.0",
-    "phantomjs": "~ 1.9.19",
+    "phantomjs": "~ 1.9.20",
     "proclaim": "^3.4.0"
   }
 }