diff --git a/.github/workflows/container-ci.yml b/.github/workflows/container-ci.yml
index 1a3940b..e50778c 100644
--- a/.github/workflows/container-ci.yml
+++ b/.github/workflows/container-ci.yml
@@ -13,13 +13,13 @@ jobs:
     steps:
       # Checks-out PeekabooAV-Installer under $GITHUB_WORKSPACE
       - name: Checkout PeekabooAV-Installer
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: scVENUS/PeekabooAV-Installer
 
       # put PeekabooAV below that as expected by the installer
       - name: Checkout PeekabooAV
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: PeekabooAV
 
diff --git a/.github/workflows/publish-container-image.yml b/.github/workflows/publish-container-image.yml
index 772c297..dfb4275 100644
--- a/.github/workflows/publish-container-image.yml
+++ b/.github/workflows/publish-container-image.yml
@@ -24,7 +24,7 @@ jobs:
     steps:
       # required for access to the local publish action
       - name: Check out PeekabooAV
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: actions
 
diff --git a/.github/workflows/publish-container-images-scheduled.yml b/.github/workflows/publish-container-images-scheduled.yml
index 3ba12e8..8bf752f 100644
--- a/.github/workflows/publish-container-images-scheduled.yml
+++ b/.github/workflows/publish-container-images-scheduled.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out PeekabooAV
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           # get all history, branches and tags so we can build a list of refs
           # to build from
@@ -118,7 +118,7 @@ jobs:
     steps:
       # required for access to the local publish action
       - name: Check out PeekabooAV
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: actions
 
diff --git a/.github/workflows/testsuite-scheduled.yml b/.github/workflows/testsuite-scheduled.yml
index d3e2dbb..53c11be 100644
--- a/.github/workflows/testsuite-scheduled.yml
+++ b/.github/workflows/testsuite-scheduled.yml
@@ -19,7 +19,7 @@ jobs:
         branch: ["master", "2.1"]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ matrix.branch }}
 
@@ -46,7 +46,7 @@ jobs:
         branch: ["2.0"]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ matrix.branch }}
 
diff --git a/.github/workflows/testsuite.yml b/.github/workflows/testsuite.yml
index 0816850..1ebaad0 100644
--- a/.github/workflows/testsuite.yml
+++ b/.github/workflows/testsuite.yml
@@ -22,7 +22,7 @@ jobs:
             python-version: "3.6"
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4