diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 2c4508c..db070c3 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -16,7 +16,7 @@ jobs:
     name: Check
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - run: cargo check --all
 
@@ -28,8 +28,8 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
         toolchain: [stable, nightly]
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
+      - uses: actions/checkout@v4
         with:
           repository: messense/crfsuite-rs
           path: tests/crfsuite-rs
@@ -98,7 +98,7 @@ jobs:
     name: MSRV
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@1.63.0
       - run: cargo check
 
@@ -106,7 +106,7 @@ jobs:
     name: Rustfmt
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt
@@ -116,7 +116,7 @@ jobs:
     name: Clippy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: clippy
@@ -127,5 +127,5 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: codespell-project/actions-codespell@master
diff --git a/.github/workflows/Release.yml b/.github/workflows/Release.yml
index b847572..b881d56 100644
--- a/.github/workflows/Release.yml
+++ b/.github/workflows/Release.yml
@@ -10,7 +10,7 @@ jobs:
   macos:
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           targets: aarch64-apple-darwin
@@ -62,7 +62,7 @@ jobs:
           - arch: x86
             target: i686-pc-windows-msvc
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
       - uses: dtolnay/rust-toolchain@stable
       - name: Build
@@ -119,7 +119,7 @@ jobs:
       env:
         CFLAGS_armv7_unknown_linux_musleabihf: '-mfpu=vfpv3-d16'
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Build
         uses: PyO3/maturin-action@main
         with:
@@ -167,7 +167,7 @@ jobs:
     environment: Docker Hub
     if: ${{ github.event_name != 'pull_request' }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Docker meta
         id: meta
         uses: docker/metadata-action@v4