diff --git a/.travis.yml b/.travis.yml
index 0f826ab3..9427be32 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,6 @@ node_js:
   - node
   - 10
   - 8
-  - 6
 
 before_script:
   - yarn build
diff --git a/package.json b/package.json
index 64b1b3cc..f34e5727 100644
--- a/package.json
+++ b/package.json
@@ -67,6 +67,9 @@
     "tslint-config-leapfrog": "^1.0.3",
     "typescript": "^3.3"
   },
+  "engines": {
+    "node": ">=8.0.0"
+  },
   "publishConfig": {
     "access": "public"
   }