diff --git a/content/dev/build/web/_index.en.md b/content/dev/build/web/_index.en.md
index b58a31e..2a345e4 100644
--- a/content/dev/build/web/_index.en.md
+++ b/content/dev/build/web/_index.en.md
@@ -15,7 +15,7 @@ cd flutter/web/js
 npm install ts-proto
 # only works with vite<=2.8, see: https://github.com/vitejs/vite/blob/main/docs/guide/build.md#chunking-strategy
 npm install vite@2.8
-
+npm install --global yarn
 yarn build
 
 cd ..