diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9f7e456a..7b89bfba 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,6 +41,8 @@ jobs:
         run: pnpm run lint
       - name: Build
         run: pnpm run build
+      - name: Biome Check
+        run: pnpm exec biome check --no-errors-on-unmatched --files-ignore-unknown=true
 
   test-synapse-sdk:
     needs: lint