diff --git a/.travis.yml b/.travis.yml
index 280a646..7dc081a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,6 @@
 sudo: false
 language: node_js
 node_js:
-  - '0.12'
-  - '4'
-  - '5'
   - '6'
+  - '8'
+  - '10'
diff --git a/appveyor.yml b/appveyor.yml
index 026d49e..aed53a6 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,8 +1,8 @@
 environment:
   matrix:
-    - nodejs_version: '8'
     - nodejs_version: '6'
-    - nodejs_version: '4'
+    - nodejs_version: '8'
+    - nodejs_version: '10'
 install:
   - ps: Install-Product node $env:nodejs_version
   - npm -g install npm@latest
diff --git a/package.json b/package.json
index 48c2100..c61f31f 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,9 @@
   "version": "1.4.2",
   "description": "Wrap all spawned Node.js child processes by adding environs and arguments ahead of the main JavaScript file argument.",
   "main": "index.js",
+  "engines": {
+    "node": ">=6.0.0"
+  },
   "dependencies": {
     "foreground-child": "^1.5.6",
     "mkdirp": "^0.5.0",