diff --git a/.github/workflows/build-pdf.yml b/.github/workflows/build-pdf.yml
index 43c4066..79e9127 100644
--- a/.github/workflows/build-pdf.yml
+++ b/.github/workflows/build-pdf.yml
@@ -24,6 +24,8 @@ jobs:
         id: tag
         run: |
           # See https://docs.github.com/en/get-started/using-git/dealing-with-special-characters-in-branch-and-tag-names
+          git config --global user.name 'GitHub Actions'
+          git config --global user.email 'actions@github.com'
           TAG=v$(date -Iseconds | sed 's/[T:\+]/-/g')
           echo "$TAG"
           echo "tag=$TAG" >> $GITHUB_OUTPUT