diff --git a/package.json b/package.json
index b1af77b4..cff370e0 100644
--- a/package.json
+++ b/package.json
@@ -62,7 +62,8 @@
     "unist-util-visit": "^1.1.3"
   },
   "engines": {
-    "node": ">=8.4.0"
+    "node": "^8.4.0",
+    "yarn": "^1.7.0"
   },
   "homepage": "https://reactjs.org/",
   "keywords": [