diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
index 3e38eb5..23d234f 100644
--- a/.github/workflows/deploy-docs.yml
+++ b/.github/workflows/deploy-docs.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
     - name: checkout
-      uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v 6.0.2
       with:
         fetch-depth: 0
         persist-credentials: false
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 19794b1..5dbaeb7 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
 
     steps:
-    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v 6.0.2
       with:
         fetch-depth: 0
         persist-credentials: false
diff --git a/.github/workflows/tests_octave.yml b/.github/workflows/tests_octave.yml
index 68dcb5d..2bd5d8d 100644
--- a/.github/workflows/tests_octave.yml
+++ b/.github/workflows/tests_octave.yml
@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
 
     steps:
-    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v 6.0.2
       with:
         fetch-depth: 0
         persist-credentials: false