diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ec746bc..baa7a5e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -31,7 +31,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout branch ${{ github.ref_name }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - run: sudo apt-get update
       - name: Restore opam cache
diff --git a/.github/workflows/lint-opam.yml b/.github/workflows/lint-opam.yml
index aead375..d04c2a3 100644
--- a/.github/workflows/lint-opam.yml
+++ b/.github/workflows/lint-opam.yml
@@ -15,7 +15,7 @@ jobs:
     timeout-minutes: 20
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Set up opam
         uses: ocaml/setup-ocaml@v3
         with:
diff --git a/.github/workflows/refresh-cache.yml b/.github/workflows/refresh-cache.yml
index c9182fc..f4d1d53 100644
--- a/.github/workflows/refresh-cache.yml
+++ b/.github/workflows/refresh-cache.yml
@@ -16,7 +16,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: Checkout branch ${{ github.ref_name }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - run: sudo apt-get update
       - name: Restore opam cache