diff --git a/.github/workflows/plantuml.yml b/.github/workflows/plantuml.yml
index 3069661..ece5e38 100644
--- a/.github/workflows/plantuml.yml
+++ b/.github/workflows/plantuml.yml
@@ -6,7 +6,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: generate and commit diagrams
         uses: zaphiro-technologies/commit-plantuml-action@install-google-fonts
         with: