diff --git a/package.json b/package.json
index e69bd6ae..743baa7e 100644
--- a/package.json
+++ b/package.json
@@ -57,6 +57,6 @@
   },
   "engines": {
     "node": ">=6.9",
-    "npm": ">=3.10"
+    "yarn": "^0.21.3"
   }
 }