diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index d781c3c..2e9d273 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -69,7 +69,16 @@ jobs:
         bundle install
         bundle exec rake build
 
-    # TODO: fail workflow if bucket name or distribution_id is not found
+    - name: Validate Outputs
+      uses: actions/github-script@v6
+      with:
+        script: |
+          const bucketName = steps.terragrunt_output.outputs.bucket_name;
+          const distributionId = steps.terragrunt_output.outputs.distribution_id;
+
+          if (!bucketName || !distributionId) {
+            core.setFailed('Required outputs not found');
+          }
 
     - name: Copy output to S3
       run: aws s3 sync ./_site/ s3://${{ steps.terragrunt_output.outputs.bucket_name }} --acl public-read --delete --cache-control max-age=604800