diff --git a/.github/workflows/action.yml b/.github/workflows/action.yml
index 30d472b..94211d4 100644
--- a/.github/workflows/action.yml
+++ b/.github/workflows/action.yml
@@ -14,7 +14,7 @@ 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
@@ -31,7 +31,7 @@ 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:
@@ -42,7 +42,7 @@ 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:
@@ -53,7 +53,7 @@ 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: