diff --git a/.github/workflows/firebase-hosting-merge.yml b/.github/workflows/firebase-hosting-merge.yml
index 876d32e..17cf5e7 100644
--- a/.github/workflows/firebase-hosting-merge.yml
+++ b/.github/workflows/firebase-hosting-merge.yml
@@ -19,7 +19,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - run: echo "REACT_APP_BUILD_TIME=$(date +%s000)" >> ${GITHUB_ENV}
-      - run: npm ci && npm run build
+      - run: yarn && yarn build
       - uses: FirebaseExtended/action-hosting-deploy@v0
         with:
           repoToken: "${{ secrets.GITHUB_TOKEN }}"
diff --git a/.github/workflows/firebase-hosting-pull-request.yml b/.github/workflows/firebase-hosting-pull-request.yml
index 9cbde77..8f9442f 100644
--- a/.github/workflows/firebase-hosting-pull-request.yml
+++ b/.github/workflows/firebase-hosting-pull-request.yml
@@ -17,7 +17,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - run: echo "REACT_APP_BUILD_TIME=$(date +%s000)" >> ${GITHUB_ENV}
-      - run: npm ci && npm run build
+      - run: yarn && yarn build
       - uses: FirebaseExtended/action-hosting-deploy@v0
         with:
           repoToken: "${{ secrets.GITHUB_TOKEN }}"