diff --git a/package.json b/package.json
index ac71cf57f39ed95d2f6ccc00c340aa509cc45fb9..c628f856f39df8611449c572ca2de7a678267fda 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "url": "git://github.com/hakimel/reveal.js.git"
   },
   "engines": {
-    "node": ">=4.0.0"
+    "node": ">=9.0.0"
   },
   "devDependencies": {
     "express": "^4.16.2",