diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 58125bb..ac35284 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -15,6 +15,19 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  format:
+    name: Format check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        run: rustup toolchain install stable --profile minimal --component rustfmt
+
+      - name: Run rustfmt
+        run: cargo fmt --all -- --check
+
   build:
     runs-on: ubuntu-latest
     outputs: