diff --git a/.github/workflows/fuzz.yml b/.github/workflows/fuzz.yml
index b2378128..4f8cbbc4 100644
--- a/.github/workflows/fuzz.yml
+++ b/.github/workflows/fuzz.yml
@@ -24,9 +24,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: checkout MPC
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: checkout ACE_TAO
-      uses: actions/checkout@v3
+      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 228b0b69..a89637ae 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -35,9 +35,9 @@ jobs:
       CXX: ${{ matrix.CXX }}
     steps:
     - name: checkout MPC
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: checkout ACE_TAO
-      uses: actions/checkout@v3
+      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 d44db28d..35336f55 100644
--- a/.github/workflows/macosx.yml
+++ b/.github/workflows/macosx.yml
@@ -31,9 +31,9 @@ jobs:
       MPC_ROOT: ${{ github.workspace }}/
     steps:
     - name: checkout MPC
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: checkout ACE/TAO
-      uses: actions/checkout@v3
+      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 9e1e5f95..92180c2f 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -70,9 +70,9 @@ jobs:
       VCPKG_INSTALLED_DIR: ${{ github.workspace }}/vcpkg_installed
     steps:
     - name: checkout MPC
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: checkout ACE_TAO
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         repository: DOCGroup/ACE_TAO
         path: ${{ env.DOC_ROOT }}