diff --git a/package.json b/package.json
index 1592ca8..53166a7 100644
--- a/package.json
+++ b/package.json
@@ -128,6 +128,9 @@
       ]
     }
   },
+  "engines": {
+    "node": ">=8.0"
+  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/c8r/x0.git"