diff --git a/package.json b/package.json
index 1ee8774ec7..a6edce4a43 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
     "url": "https://github.com/openfoodfoundation/openfoodnetwork"
   },
   "license": "AGPL-3.0",
+  "packageManager": "yarn@1.22.2",
   "dependencies": {
     "@babel/core": "^7.28.5",
     "@babel/plugin-transform-runtime": "^7.28.5",