diff --git a/.github/workflows/c-std.yml b/.github/workflows/c-std.yml
index 3256fc859..c6380bbf6 100644
--- a/.github/workflows/c-std.yml
+++ b/.github/workflows/c-std.yml
@@ -116,7 +116,7 @@ jobs:
     steps:
 
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         show-progress: 'false'
 
@@ -240,7 +240,7 @@ jobs:
     steps:
 
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         show-progress: 'false'
 
diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index bdea59f45..1dd8d537d 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -95,7 +95,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Install packages (Windows)
       if: runner.os == 'Windows'
@@ -123,7 +123,7 @@ jobs:
       run: cmake --build ../build --config ${{ matrix.build-config || 'Release' }} -t ${{ matrix.pkgtgt }}
 
     - name: Upload build errors
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       if: failure()
       with:
         name: ${{ matrix.name }} (cmake)
diff --git a/.github/workflows/configure.yml b/.github/workflows/configure.yml
index 837620d42..ed67d1332 100644
--- a/.github/workflows/configure.yml
+++ b/.github/workflows/configure.yml
@@ -105,7 +105,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Install packages (Ubuntu)
       if: runner.os == 'Linux' && matrix.packages
@@ -137,7 +137,7 @@ jobs:
         QEMU_RUN: ${{ matrix.qemu-run }}
 
     - name: Upload build errors
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       if: failure()
       with:
         name: ${{ matrix.name }} (configure)
diff --git a/.github/workflows/fuzz.yml b/.github/workflows/fuzz.yml
index ddca83c37..b065d09fd 100644
--- a/.github/workflows/fuzz.yml
+++ b/.github/workflows/fuzz.yml
@@ -18,7 +18,7 @@ jobs:
         dry-run: false
 
     - name: Upload Crash
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       if: failure()
       with:
         name: artifacts
diff --git a/.github/workflows/msys-cygwin.yml b/.github/workflows/msys-cygwin.yml
index 45d4a261a..d58e4887f 100644
--- a/.github/workflows/msys-cygwin.yml
+++ b/.github/workflows/msys-cygwin.yml
@@ -18,7 +18,7 @@ jobs:
         shell: msys2 {0}
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - name: Setup MSYS2
@@ -66,7 +66,7 @@ jobs:
     name: Cygwin
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - name: Setup cygwin
diff --git a/.github/workflows/others.yml b/.github/workflows/others.yml
index edb9860c6..d7b40ec00 100644
--- a/.github/workflows/others.yml
+++ b/.github/workflows/others.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     name: DragonflyBSD
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: DragonflyBSD
       uses: vmactions/dragonflybsd-vm@v1
       with:
@@ -31,7 +31,7 @@ jobs:
           - name: aarch64
           - name: x86_64
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: FreeBSD - ${{ matrix.name }}
       uses: vmactions/freebsd-vm@v1
       with:
@@ -56,7 +56,7 @@ jobs:
           - name: aarch64
           - name: x86_64
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: NetBSD - ${{ matrix.name }}
       uses: vmactions/netbsd-vm@v1
       with:
@@ -77,7 +77,7 @@ jobs:
     runs-on: ubuntu-latest
     name: OmniOS
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: OmniOS
       uses: vmactions/omnios-vm@v1
       with:
@@ -101,7 +101,7 @@ jobs:
           - name: x86_64
           - name: riscv64
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: OpenBSD - ${{ matrix.name }}
       uses: vmactions/openbsd-vm@v1
       with:
@@ -120,7 +120,7 @@ jobs:
 #    runs-on: ubuntu-latest
 #    name: OpenIndiana
 #    steps:
-#    - uses: actions/checkout@v4
+#    - uses: actions/checkout@v6
 #    - name: OpenIndiana
 #      uses: vmactions/openindiana-vm@v0
 #      with:
@@ -137,7 +137,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Solaris
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: Solaris
       uses: vmactions/solaris-vm@v1
       with: