diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index e321f7b31..fe56ba719 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -43,7 +43,7 @@ jobs:
             os: macOS-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           # For Codecov, we must also fetch the parent of the HEAD commit to
           # be able to properly deal with PRs / merges
@@ -89,7 +89,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 20
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: '1'
diff --git a/.github/workflows/Invalidations.yml b/.github/workflows/Invalidations.yml
index 4021410a0..f737f77db 100644
--- a/.github/workflows/Invalidations.yml
+++ b/.github/workflows/Invalidations.yml
@@ -19,12 +19,12 @@ jobs:
     - uses: julia-actions/setup-julia@v1
       with:
         version: '1'
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: julia-actions/julia-buildpkg@v1
     - uses: julia-actions/julia-invalidations@v1
       id: invs_pr
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         ref: ${{ github.event.repository.default_branch }}
     - uses: julia-actions/julia-buildpkg@v1
diff --git a/.github/workflows/oscar.yml b/.github/workflows/oscar.yml
index 597b24346..cf53aead3 100644
--- a/.github/workflows/oscar.yml
+++ b/.github/workflows/oscar.yml
@@ -25,7 +25,7 @@ jobs:
       PR_NUMBER: ${{github.event.number || '0' }}
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: "Set up Julia"
       uses: julia-actions/setup-julia@v1
       with:
@@ -65,7 +65,7 @@ jobs:
       fail-fast: false
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: "Set up Julia"
         uses: julia-actions/setup-julia@v1
         with: