diff --git a/.github/workflows/firebase-hosting-merge.yml b/.github/workflows/firebase-hosting-merge.yml
index 8a691b6..c894df0 100644
--- a/.github/workflows/firebase-hosting-merge.yml
+++ b/.github/workflows/firebase-hosting-merge.yml
@@ -11,6 +11,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - run: npm install -g yarn
+      - run: yarn
       - uses: FirebaseExtended/action-hosting-deploy@v0
         with:
           repoToken: '${{ secrets.GITHUB_TOKEN }}'
diff --git a/package.json b/package.json
index c268055..65dc2d9 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
         "start": "yarn run serve",
         "serve": "node build/index.js",
         "dev": "ts-node-dev -r dotenv/config src/index.ts",
-        "build": "yarn && tsc --project tsconfig.json",
+        "build": "tsc --project tsconfig.json",
         "lint": "eslint '*/**/*.{js,ts}' --quiet --fix",
         "lint:check": "eslint '*/**/*.{js,ts}'",
         "test": "NODE_ENV=test echo \"Test not implemented\"!"