diff --git a/.github/workflows/diagram.yml b/.github/workflows/diagram.yml
index 2c14ed161..5314639bc 100644
--- a/.github/workflows/diagram.yml
+++ b/.github/workflows/diagram.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@master
+        uses: actions/checkout@v3
       - name: Update diagram
         uses: githubocto/repo-visualizer@main
         with: