diff --git a/.github/actions/install-sphinx-markdown-builder/action.yml b/.github/actions/install-sphinx-markdown-builder/action.yml
index 5cbfb5768..88f29fbce 100644
--- a/.github/actions/install-sphinx-markdown-builder/action.yml
+++ b/.github/actions/install-sphinx-markdown-builder/action.yml
@@ -7,5 +7,6 @@ runs:
   using: "composite"
   steps:
     - run: |
-        pip install git+https://github.com/krobelus/sphinx-markdown-builder@ae8cf577bfb263dcda509ad449a331b9b74664fa
+        commit=a6dd85e7b13107172c0502937bec6b718002510d
+        pip install git+https://github.com/krobelus/sphinx-markdown-builder@"$commit"
       shell: bash
diff --git a/build_tools/release-notes.sh b/build_tools/release-notes.sh
index b45a994b3..100dc7911 100755
--- a/build_tools/release-notes.sh
+++ b/build_tools/release-notes.sh
@@ -38,6 +38,7 @@ sphinx-build >&2 -j auto \
     -d "$relnotes_tmp/doctree" "$relnotes_tmp/fake-workspace/doc_src" "$relnotes_tmp/out" \
     -D markdown_http_base="https://fishshell.com/docs/$minor_version" \
     -D markdown_uri_doc_suffix=".html" \
+    -D markdown_github_flavored=1 \
     "$@"
 
 # Delete changelog header