diff --git a/.travis.yml b/.travis.yml
index 433c995183e..a017a9d8369 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -54,7 +54,7 @@ matrix:
     include:
           # Run grunt/npm install on highest version ('node' is an alias for the latest node.js version.)
         - php: 7.1
-          env: DB=none     TASK=GRUNT   NVM_VERSION='node'
+          env: DB=none     TASK=GRUNT   NVM_VERSION='8.9'
 
     exclude:
         # MySQL - it's just too slow.
diff --git a/package.json b/package.json
index 01dc1dcba4f..6f138068cc7 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,6 @@
     "xpath": "0.0.23"
   },
   "engines": {
-    "node": ">=4"
+    "node": "8.9"
   }
 }