diff --git a/package.json b/package.json
index 1fba6d671e..4aa1c1a347 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,8 @@
 		"url": "https://develop.svn.wordpress.org/trunk"
 	},
 	"engines": {
-		"node": "8.9.3"
+		"node": "8.9.3",
+		"npm": "6.1.0"
 	},
 	"author": "The WordPress Contributors",
 	"license": "GPL-2.0-or-later",