diff --git a/.github/workflows/copilot-build-frontend.yml b/.github/workflows/copilot-build-frontend.yml
index 2f0c4d2b2..9a5b5b577 100644
--- a/.github/workflows/copilot-build-frontend.yml
+++ b/.github/workflows/copilot-build-frontend.yml
@@ -29,7 +29,7 @@ jobs:
           #!/usr/bin/env bash
           set -e # exit with nonzero exit code if anything fails
           echo "Running yarn install, yarn build, & yarn format"
-          yarn install #--frozen-lockfile # install dependencies and ensure lockfile is unchanged.
+          yarn install --frozen-lockfile # install dependencies and ensure lockfile is unchanged.
           yarn build # run build script
           yarn format # run format script
         working-directory: webapp