diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5a96a93c..12f79401 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,6 +37,9 @@ jobs:
       run: yarn test:jest --coverage
       if: always()
 
+    - name: Build
+      run: yarn build
+
     - uses: codecov/codecov-action@v2
       with:
         directory: ./coverage/
diff --git a/package.json b/package.json
index 68483c71..b34c85f5 100644
--- a/package.json
+++ b/package.json
@@ -102,7 +102,7 @@
     "clean-install": "yarn clean && yarn",
     "start": "webpack serve --config webpack.dev.js",
     "analyze": "webpack --config webpack.analyze.js",
-    "build": "rimraf dist/ && mkdirp dist && cp README.md dist && rollup -c && webpack && node update-sri.js package dist/README.md",
+    "build": "rimraf dist/ && mkdirp dist && cp README.md dist && rollup -c --failAfterWarnings && webpack && node update-sri.js package dist/README.md",
     "watch": "yarn build --watch",
     "postversion": "yarn dist && node update-sri.js package README.md contrib/*/README.md docs/*.md website/pages/index.html",
     "semantic-release": "semantic-release",