diff --git a/.github/workflows/check-cpp23.yml b/.github/workflows/check-cpp23.yml
index 15b16e71e40..097663a93a3 100644
--- a/.github/workflows/check-cpp23.yml
+++ b/.github/workflows/check-cpp23.yml
@@ -29,7 +29,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2
 
diff --git a/.github/workflows/check-vla.yml b/.github/workflows/check-vla.yml
index 94e367be337..7d82c85240d 100644
--- a/.github/workflows/check-vla.yml
+++ b/.github/workflows/check-vla.yml
@@ -21,7 +21,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2
 
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index c7dd945f5fc..79a1a4b7ecf 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2
 
diff --git a/.github/workflows/compile-msvc.yml b/.github/workflows/compile-msvc.yml
index 7560bc05493..91f080e6b90 100644
--- a/.github/workflows/compile-msvc.yml
+++ b/.github/workflows/compile-msvc.yml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2
 
diff --git a/.github/workflows/coverity.yml b/.github/workflows/coverity.yml
index 2691b9e895d..8a8102807bd 100644
--- a/.github/workflows/coverity.yml
+++ b/.github/workflows/coverity.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2
 
diff --git a/.github/workflows/full-regression.yml b/.github/workflows/full-regression.yml
index a6b5353b9b0..3c58c5ca2e9 100644
--- a/.github/workflows/full-regression.yml
+++ b/.github/workflows/full-regression.yml
@@ -23,7 +23,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2
         show-progress: false
diff --git a/.github/workflows/kokkos-regression.yaml b/.github/workflows/kokkos-regression.yaml
index a475c1eb7b4..c927f526ff0 100644
--- a/.github/workflows/kokkos-regression.yaml
+++ b/.github/workflows/kokkos-regression.yaml
@@ -23,7 +23,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2
         show-progress: false
diff --git a/.github/workflows/lammps-gui-flatpak.yml b/.github/workflows/lammps-gui-flatpak.yml
index d7dc6024767..e7db109f176 100644
--- a/.github/workflows/lammps-gui-flatpak.yml
+++ b/.github/workflows/lammps-gui-flatpak.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2
 
diff --git a/.github/workflows/quick-regression.yml b/.github/workflows/quick-regression.yml
index 88794bfa0a9..94589b7f9a2 100644
--- a/.github/workflows/quick-regression.yml
+++ b/.github/workflows/quick-regression.yml
@@ -27,7 +27,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
         show-progress: false
diff --git a/.github/workflows/style-check.yml b/.github/workflows/style-check.yml
index e3567140fbb..ba846581d89 100644
--- a/.github/workflows/style-check.yml
+++ b/.github/workflows/style-check.yml
@@ -23,7 +23,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 1
 
diff --git a/.github/workflows/unittest-arm64.yml b/.github/workflows/unittest-arm64.yml
index 094c5fb0c12..4f2bd95a633 100644
--- a/.github/workflows/unittest-arm64.yml
+++ b/.github/workflows/unittest-arm64.yml
@@ -21,7 +21,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2
 
diff --git a/.github/workflows/unittest-linux.yml b/.github/workflows/unittest-linux.yml
index ce98fcea35e..65f048afcc2 100644
--- a/.github/workflows/unittest-linux.yml
+++ b/.github/workflows/unittest-linux.yml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2
 
diff --git a/.github/workflows/unittest-macos.yml b/.github/workflows/unittest-macos.yml
index 0d478a9d6bb..3bef1779fcd 100644
--- a/.github/workflows/unittest-macos.yml
+++ b/.github/workflows/unittest-macos.yml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2