diff --git a/package.json b/package.json
index 2b23e59..53a91b4 100644
--- a/package.json
+++ b/package.json
@@ -59,8 +59,8 @@
     "typescript": "~3.2.4"
   },
   "engines": {
-    "node": ">=6.0.0",
-    "npm": ">=3.0.0"
+    "node": ">=8.0.0",
+    "npm": ">=5.7.1"
   },
   "author": "CKSource (http://cksource.com/)",
   "license": "GPL-2.0-or-later",