diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 22f4fae4e..d90216f44 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -55,7 +55,7 @@ jobs:
     steps:
       # (3) checkout this repository in order to "see" the following custom action
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       # (4) "use" the custom action to retrigger the failed "acceptance job" above
       # NOTE: pass the SOURCE_GITHUB_TOKEN to the custom action because (a) it must have
diff --git a/.github/workflows/workflow-restarter-test.yml b/.github/workflows/workflow-restarter-test.yml
index cf3b1a179..886854905 100644
--- a/.github/workflows/workflow-restarter-test.yml
+++ b/.github/workflows/workflow-restarter-test.yml
@@ -48,7 +48,7 @@ jobs:
     steps:
       # (3) checkout this repository in order to "see" the following custom action
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       # (4) "use" the custom action to retrigger the failed "acceptance job" above
       # NOTE: pass the SOURCE_GITHUB_TOKEN to the custom action because (a) it must have