diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index be51463..0aa39b2 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -5,7 +5,7 @@ jobs:
     name: cargo fmt
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup Rust toolchain
         run: rustup show && rustup update
       - name: cargo fmt
@@ -15,7 +15,7 @@ jobs:
     name: cargo clippy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup Rust toolchain
         run: rustup show && rustup update
       - name: cargo clippy
@@ -25,7 +25,7 @@ jobs:
     name: cargo readme
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - run: cargo +stable install cargo-readme
       - run: cd ciborium-io && cargo readme > README.md
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2e10565..15fd29c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,7 +5,7 @@ jobs:
     name: test ${{ matrix.toolchain }} ${{ matrix.profile.name }} ${{ matrix.crates.name }} ${{ matrix.crates.feat }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup toolchain install ${{ matrix.toolchain }}
       - name: cargo test