diff --git a/scripts/run-pr.sh b/scripts/run-pr.sh
index e8e65c5d..a83c6dd1 100755
--- a/scripts/run-pr.sh
+++ b/scripts/run-pr.sh
@@ -10,6 +10,6 @@ fi
 git fetch https://github.com/thelounge/lounge.git refs/pull/${1}/head
 git checkout FETCH_HEAD
 npm install
-npm run build
+NODE_ENV=production npm run build
 npm test || true
 npm start