diff --git a/.github/workflows/format_rst.yml b/.github/workflows/format_rst.yml
index 5d5ab06..47753de 100644
--- a/.github/workflows/format_rst.yml
+++ b/.github/workflows/format_rst.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4