diff --git a/.travis.yml b/.travis.yml
index 20fd86b..8524235 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,3 @@
 language: node_js
 node_js:
-  - 0.10
+  - 4
diff --git a/package.json b/package.json
index 43e28a7..d5dab2a 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
 		"docs"
 	],
 	"engines": {
-		"node": ">=4.0.0"
+		"node": ">=4.2.0"
 	},
 	"main": "./lib/ratify.js",
 	"repository": {