diff --git a/web-app/package.json b/web-app/package.json
index 0b7a411..e221218 100644
--- a/web-app/package.json
+++ b/web-app/package.json
@@ -6,6 +6,7 @@
   "engines": {
     "node": "^20.19.0 || >=22.12.0"
   },
+  "packageManager": "yarn@1.22.22",
   "scripts": {
     "dev": "vite",
     "build": "run-p type-check \"build-only {@}\" --",