diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 41858c6..4f5d9b0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,6 +15,10 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     - uses: dtolnay/rust-toolchain@stable
+      with:
+        components: rustfmt
+    - name: Check format
+      run: cargo fmt --check
     - name: Build
       run: cargo build
     - name: Install runtime system dependencies