diff --git a/.github/workflows/build-wasm_of_ocaml.yml b/.github/workflows/build-wasm_of_ocaml.yml
index 9a5331b86..124077a69 100644
--- a/.github/workflows/build-wasm_of_ocaml.yml
+++ b/.github/workflows/build-wasm_of_ocaml.yml
@@ -51,7 +51,7 @@ jobs:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
 
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: wasm_of_ocaml
 
@@ -66,7 +66,7 @@ jobs:
         run: opam install --fake binaryen-bin
 
       - name: Checkout Jane Street opam repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: janestreet/opam-repository
           ref: feaf8f831051fd5f316963b28efd728cf0b0eca1
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 32cf3f341..417a55243 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -98,7 +98,7 @@ jobs:
           sudo aptitude -o Acquire::Retries=30 install gcc-multilib g++-multilib pkg-config libgmp-dev libgmp-dev:i386 libx11-dev:i386 -y
 
       - name: Checkout tree
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set-up Node.js
         uses: actions/setup-node@v4
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index e912e7b97..f2f6f7141 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout tree
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Set-up OCaml
         uses: ocaml/setup-ocaml@v3
         with:
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout tree
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Set-up OCaml
         uses: ocaml/setup-ocaml@v3
         with:
@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout tree
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Set-up Biome
         uses: biomejs/setup-biome@v2
       - name: Run biome