diff --git a/.github/workflows/convert-md-to-html.yml b/.github/workflows/convert-md-to-html.yml
index ebdc2a4..dec39da 100644
--- a/.github/workflows/convert-md-to-html.yml
+++ b/.github/workflows/convert-md-to-html.yml
@@ -14,7 +14,7 @@ jobs:
     name: Build HTML
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@master
       - uses: baileyjm02/markdown-to-pdf@v1.2.0
         with:
           input_dir: /