diff --git a/.github/workflows/alpine_builds.yml b/.github/workflows/alpine_builds.yml
index 8263126..badf72d 100644
--- a/.github/workflows/alpine_builds.yml
+++ b/.github/workflows/alpine_builds.yml
@@ -17,7 +17,7 @@ jobs:
         apk add autoconf automake bash build-base clang clang-analyzer git \
           libfido2-dev libtool linux-pam-dev openssl-dev pkgconfig
     - name: checkout pam-u2f
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: mark workspace as safe
       run: git config --global --add safe.directory "${GITHUB_WORKSPACE}"
     - name: build
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 6014aca..dc41c4a 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index 272d804..535343a 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -8,7 +8,7 @@ jobs:
     env:
       CLANG_FORMAT_VERSION: -15
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - name: Dependencies
diff --git a/.github/workflows/linux_builds.yml b/.github/workflows/linux_builds.yml
index e09c542..a452c69 100644
--- a/.github/workflows/linux_builds.yml
+++ b/.github/workflows/linux_builds.yml
@@ -14,7 +14,7 @@ jobs:
           - { os: ubuntu-20.04, cc: gcc-10 }
           - { os: ubuntu-20.04, cc: clang-11 }
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: dependencies
       env:
         CC: ${{ matrix.cc }}
diff --git a/.github/workflows/linux_fuzz.yml b/.github/workflows/linux_fuzz.yml
index 3d9b2c8..b11c3bd 100644
--- a/.github/workflows/linux_fuzz.yml
+++ b/.github/workflows/linux_fuzz.yml
@@ -12,7 +12,7 @@ jobs:
         cc: [clang-15]
         sanitizer: [asan]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Dependencies
       env:
         CC: ${{ matrix.cc }}
diff --git a/.github/workflows/macos_builds.yml b/.github/workflows/macos_builds.yml
index 515791b..04faf3c 100644
--- a/.github/workflows/macos_builds.yml
+++ b/.github/workflows/macos_builds.yml
@@ -11,7 +11,7 @@ jobs:
         os: [ macos-11, macos-12, macos-13 ]
         cc: [ clang ]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: dependencies
       run: brew install check cmake help2man libfido2 mandoc pkg-config automake
     - name: build