diff --git a/package.json b/package.json
index ca6ce252..143c1c88 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "description": "\"Heroku client build\"",
   "cacheDirectories": ["client/node_modules"],
   "scripts": {
-    "build": "npm install --prefix client && npm run build --prefix client"
+    "build": "yarn --cwd client install && yarn --cwd client run build"
   },
   "engines": {
     "node": "14.x",