diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 15828c2..da66f7a 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -14,11 +14,14 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install wasm32-unknown-unknown target
         run: rustup target add wasm32-unknown-unknown
 
+      - name: Set RUSTFLAGS to deny warnings
+        run: export RUSTFLAGS="--deny warnings"
+
       # With no feature. Target: normal & wasm & wasm-bindgen
       - name: Build
         run: cargo build --verbose
@@ -53,7 +56,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install wasm32-unknown-unknown target
         run: rustup target add wasm32-unknown-unknown
@@ -70,7 +73,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       # Tests
       - name: Run tests
@@ -80,8 +83,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       # Typos
       - name: typos-action
         uses: crate-ci/typos@v1.0.4
+      - name: format
+        run: cargo fmt --all -- --check
\ No newline at end of file