diff --git a/.travis.yml b/.travis.yml
index fb23570..cc87d3b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,8 @@
 language: node_js
 node_js:
-    - 6
-    - 7
+    - 12
+    - 10
+    - 8
 
 script:
   - npm run lint
diff --git a/package.json b/package.json
index 222f1ad..966190b 100644
--- a/package.json
+++ b/package.json
@@ -36,6 +36,9 @@
     "currify": "^4.0.0",
     "es6-promisify": "^6.0.0"
   },
+  "engines": {
+    "node": ">=8"
+  },
   "license": "MIT",
   "devDependencies": {
     "coveralls": "^3.0.0",