diff --git a/.travis.yml b/.travis.yml
index 17c600a..81196db 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: node_js
 sudo: false
 node_js:
-- '0.11'
+- '4.0'
 - '5.0'
 - '6.0'
 after_success: bash <(curl -s https://codecov.io/bash)
diff --git a/package.json b/package.json
index a61297b..b8a4bc8 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "remark-cli": "^2.0.0",
     "remark-preset-wooorm": "^1.0.0",
     "tape": "^4.0.0",
-    "xo": "^0.16.0"
+    "xo": "^0.17.0"
   },
   "scripts": {
     "build-md": "remark . --quiet --frail",