diff --git a/package.json b/package.json
index d0b4f33..72e3ae2 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,6 @@
   },
   "optionalDependencies": {},
   "engines": {
-    "node": "*"
+    "node": ">= 4"
   }
 }