diff --git a/.github/workflows/fuzz.yml b/.github/workflows/fuzz.yml
index 82dd9d80..677973f0 100644
--- a/.github/workflows/fuzz.yml
+++ b/.github/workflows/fuzz.yml
@@ -21,9 +21,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: checkout MPC
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
     - name: checkout ACE_TAO
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         repository: DOCGroup/ACE_TAO
         path: ${{ env.DOC_ROOT }}
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 412382a9..8bd2cf03 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -32,9 +32,9 @@ jobs:
       CXX: ${{ matrix.CXX }}
     steps:
     - name: checkout MPC
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
     - name: checkout ACE_TAO
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         repository: DOCGroup/ACE_TAO
         path: ${{ env.DOC_ROOT }}
diff --git a/.github/workflows/macosx.yml b/.github/workflows/macosx.yml
index 1da403a9..2162c8b8 100644
--- a/.github/workflows/macosx.yml
+++ b/.github/workflows/macosx.yml
@@ -28,9 +28,9 @@ jobs:
       MPC_ROOT: ${{ github.workspace }}/
     steps:
     - name: checkout MPC
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
     - name: checkout ACE/TAO
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         repository: DOCGroup/ACE_TAO
         path: ${{ env.DOC_ROOT }}
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 63725a2a..0a363eef 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -65,9 +65,9 @@ jobs:
       ZLIB_LIBDIR: ${{ github.workspace }}/vcpkg/installed/${{ matrix.vcpkgarch }}/${{ matrix.vcpkglibdir }}
     steps:
     - name: checkout MPC
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
     - name: checkout ACE_TAO
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         repository: DOCGroup/ACE_TAO
         path: ${{ env.DOC_ROOT }}