diff --git a/.github/workflows/common.yml b/.github/workflows/common.yml
index 3b7dc73b..d5f02f2c 100644
--- a/.github/workflows/common.yml
+++ b/.github/workflows/common.yml
@@ -79,12 +79,12 @@ jobs:
         if: inputs.platform == 'cygwin'
 
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: multicoretests
 
       - name: Fetch QCheck
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: c-cube/qcheck
           ref: v0.26
@@ -115,7 +115,7 @@ jobs:
         if: runner.os == 'Windows'
 
       - name: Fetch OCaml
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: ${{ env.COMPILER_REPO }}
           ref: ${{ env.COMPILER_REF }}
@@ -125,7 +125,7 @@ jobs:
         # We need to fetch OCaml in all cases for MSVC for msvs-promote-path
 
       - name: Fetch dune
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: ocaml/dune
           ref: 3.18.2
diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 11b86eb4..69ce277f 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Cache opam
         id: cache-opam
diff --git a/.github/workflows/opam.yml b/.github/workflows/opam.yml
index c7ace6a2..0ea6e0bf 100644
--- a/.github/workflows/opam.yml
+++ b/.github/workflows/opam.yml
@@ -33,7 +33,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install OCaml compiler
         uses: ocaml/setup-ocaml@v3