diff --git a/.github/workflows/deploy-pages.yml b/.github/workflows/deploy-pages.yml
index 97b1e2c..28300ef 100644
--- a/.github/workflows/deploy-pages.yml
+++ b/.github/workflows/deploy-pages.yml
@@ -51,7 +51,7 @@ jobs:
       - name: install pandoc
         uses: docker://pandoc/core:3.5
         with:
-          args: "-f org -t gfm --atx-headers <(printf "#+OPTIONS: H:9") -o src/noon/doc/guide.md src/noon/doc/guide.org"
+          args: "-f org -t gfm --markdown-headings=atx <(printf "#+OPTIONS: H:9") -o src/noon/doc/guide.md src/noon/doc/guide.org"
 
       # - name: Install Emacs
       #   uses: purcell/setup-emacs@master