diff --git a/.github/workflows/abi.yml b/.github/workflows/abi.yml
index 4dd1dd74e..4f282c138 100644
--- a/.github/workflows/abi.yml
+++ b/.github/workflows/abi.yml
@@ -7,12 +7,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
           ref: 'v3.6.0'
           path: old
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
           path: current
 
diff --git a/.github/workflows/android.yml b/.github/workflows/android.yml
index 435d6c392..fc73f06a5 100644
--- a/.github/workflows/android.yml
+++ b/.github/workflows/android.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: "build openssl"
       run: |
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 36c20691e..f3f03d15b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -27,7 +27,7 @@ jobs:
       CMAKE_GENERATOR: Ninja
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: openssl path macos
       if: ${{ runner.os == 'macOS' }}
diff --git a/.github/workflows/clang-analyze.yml b/.github/workflows/clang-analyze.yml
index b38b91c4c..10de2c285 100644
--- a/.github/workflows/clang-analyze.yml
+++ b/.github/workflows/clang-analyze.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: fix flaky azure mirrors
       if: ${{ runner.os == 'Linux' }}
diff --git a/.github/workflows/cmake_win.yml b/.github/workflows/cmake_win.yml
index ea4efd484..eb3ae8eb0 100644
--- a/.github/workflows/cmake_win.yml
+++ b/.github/workflows/cmake_win.yml
@@ -59,7 +59,7 @@ jobs:
           }
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install OpenSSL
         if: ${{ matrix.config.openssl }}
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 552885a78..cf5baf6fb 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v2
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index efe333be7..96294ba79 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -16,7 +16,7 @@ jobs:
       CMAKE_GENERATOR: Ninja
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: fix flaky azure mirrors
       if: ${{ runner.os == 'Linux' }}
diff --git a/.github/workflows/coverity.yml b/.github/workflows/coverity.yml
index 311e91177..07b23ac2d 100644
--- a/.github/workflows/coverity.yml
+++ b/.github/workflows/coverity.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Prepare
       run: cmake -B ${{github.workspace}}/build
     - uses: vapier/coverity-scan-action@v1
diff --git a/.github/workflows/fedora.yml b/.github/workflows/fedora.yml
index 010a0b96c..66f41db31 100644
--- a/.github/workflows/fedora.yml
+++ b/.github/workflows/fedora.yml
@@ -23,7 +23,7 @@ jobs:
       CMAKE_GENERATOR: Ninja
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: install devel tools
       run: |
         yum -y install gcc clang cmake make openssl-devel zlib-devel ninja-build
diff --git a/.github/workflows/freebsd.yml b/.github/workflows/freebsd.yml
index 09fbbef61..6e56cb400 100644
--- a/.github/workflows/freebsd.yml
+++ b/.github/workflows/freebsd.yml
@@ -17,7 +17,7 @@ jobs:
       CMAKE_GENERATOR: Ninja
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Test in FreeBSD
       id: test
diff --git a/.github/workflows/ios.yml b/.github/workflows/ios.yml
index fa3865bbc..75fa3e069 100644
--- a/.github/workflows/ios.yml
+++ b/.github/workflows/ios.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: macos-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: build
       run: |
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index d8eeab58a..68d68d01a 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: ccheck
       run: |
         wget "https://raw.githubusercontent.com/baresip/baresip/main/test/ccheck.py"
diff --git a/.github/workflows/mingw.yml b/.github/workflows/mingw.yml
index ed01100cf..64d765139 100644
--- a/.github/workflows/mingw.yml
+++ b/.github/workflows/mingw.yml
@@ -20,7 +20,7 @@ jobs:
       run: |
         sudo apt-get update && sudo apt-get install -y mingw-w64 ninja-build
     
-    - uses: actions/checkout@v3 # needed for pr checkout
+    - uses: actions/checkout@v4 # needed for pr checkout
 
     - uses: sreimers/pr-dependency-action@v0.6
       with:
@@ -28,7 +28,7 @@ jobs:
         repo: https://github.com/baresip/baresip-win32
         secret: ${{ secrets.GITHUB_TOKEN }}
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         path: baresip-win32/re
 
@@ -61,7 +61,7 @@ jobs:
     needs: MinGW-w64-build
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/download-artifact@v2
     - uses: sreimers/pr-dependency-action@v0.6
       with:
diff --git a/.github/workflows/musl.yml b/.github/workflows/musl.yml
index b2e51f464..7a6191ec0 100644
--- a/.github/workflows/musl.yml
+++ b/.github/workflows/musl.yml
@@ -17,7 +17,7 @@ jobs:
       CMAKE_GENERATOR: Ninja
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: install devel tools
       run: |
         apk add musl-dev git cmake gcc g++ make binutils openssl-dev linux-headers zlib-dev ninja
diff --git a/.github/workflows/sanitizers.yml b/.github/workflows/sanitizers.yml
index 988d04142..86f23d5cf 100644
--- a/.github/workflows/sanitizers.yml
+++ b/.github/workflows/sanitizers.yml
@@ -23,7 +23,7 @@ jobs:
       ASAN_OPTIONS: fast_unwind_on_malloc=0
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: fix flaky azure mirrors
       if: ${{ runner.os == 'Linux' }}
diff --git a/.github/workflows/sonar.yml b/.github/workflows/sonar.yml
index 0f3e5bdc7..a8b6e85c9 100644
--- a/.github/workflows/sonar.yml
+++ b/.github/workflows/sonar.yml
@@ -14,7 +14,7 @@ jobs:
       SONAR_SERVER_URL: "https://sonarcloud.io"
       BUILD_WRAPPER_OUT_DIR: build_wrapper_output_directory # Directory where build-wrapper output will be placed
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
       - name: Set up JDK 17
diff --git a/.github/workflows/ssl.yml b/.github/workflows/ssl.yml
index 93c0b5a7a..510346c89 100644
--- a/.github/workflows/ssl.yml
+++ b/.github/workflows/ssl.yml
@@ -15,7 +15,7 @@ jobs:
       OPENSSL_ROOT_DIR: "assets/${{ matrix.ssl }}"
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: fix flaky azure mirrors
       if: ${{ runner.os == 'Linux' }}
diff --git a/.github/workflows/strict-c.yml b/.github/workflows/strict-c.yml
index a827e5fc4..e53424650 100644
--- a/.github/workflows/strict-c.yml
+++ b/.github/workflows/strict-c.yml
@@ -16,7 +16,7 @@ jobs:
       CMAKE_GENERATOR: Ninja
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: fix flaky azure mirrors
       if: ${{ runner.os == 'Linux' }}
diff --git a/.github/workflows/valgrind.yml b/.github/workflows/valgrind.yml
index 5043e05a1..6cfa3a44e 100644
--- a/.github/workflows/valgrind.yml
+++ b/.github/workflows/valgrind.yml
@@ -10,7 +10,7 @@ jobs:
       CMAKE_GENERATOR: Ninja
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: fix flaky azure mirrors
       if: ${{ runner.os == 'Linux' }}