diff --git a/.github/workflows/system_test.yml b/.github/workflows/system_test.yml
index 4e3e8c6..213c8cc 100644
--- a/.github/workflows/system_test.yml
+++ b/.github/workflows/system_test.yml
@@ -21,7 +21,7 @@ jobs:
         runs-on: ubuntu-latest
 
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v6
             with:
                 fetch-depth: 0
                 submodules: recursive
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 339d7d0..c863e92 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
         runs-on: ubuntu-latest
 
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v6
             with:
                 fetch-depth: 0
                 submodules: recursive
diff --git a/.github/workflows/test_docker.yml b/.github/workflows/test_docker.yml
index 0553674..ffa7d6b 100644
--- a/.github/workflows/test_docker.yml
+++ b/.github/workflows/test_docker.yml
@@ -25,7 +25,7 @@ jobs:
                 sudo apt-get update
                 sudo apt-get install -y tree
         -   name: Clone repo
-            uses: actions/checkout@v4
+            uses: actions/checkout@v6
         -   name: build image
             run: make Docker_build
         -   name: print version
diff --git a/.github/workflows/update_listing.yml b/.github/workflows/update_listing.yml
index e08d875..9505629 100644
--- a/.github/workflows/update_listing.yml
+++ b/.github/workflows/update_listing.yml
@@ -17,7 +17,7 @@ jobs:
         runs-on: ubuntu-latest
 
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v6
             with:
                 fetch-depth: 0
                 submodules: recursive
diff --git a/.github/workflows/validate_cff.yml b/.github/workflows/validate_cff.yml
index 9efe394..b237873 100644
--- a/.github/workflows/validate_cff.yml
+++ b/.github/workflows/validate_cff.yml
@@ -17,7 +17,7 @@ jobs:
     validate_cff:
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v6
         -   name: Check whether the citation metadata from CITATION.cff is valid
             uses: citation-file-format/cffconvert-github-action@2.0.0
             with: