diff --git a/.github/workflows/build-ls-struct.yml b/.github/workflows/build-ls-struct.yml
index 8f3ff98..2650991 100644
--- a/.github/workflows/build-ls-struct.yml
+++ b/.github/workflows/build-ls-struct.yml
@@ -29,9 +29,12 @@ jobs:
         echo "REVNUMBER=$REVNUMBER" >> $GITHUB_ENV
 
     - name: Generate HTML
-      uses: avattathil/asciidoctor-action@master
-      with:
-        program: asciidoctor --attribute=revnumber=${{ env.REVNUMBER }} --attribute=revdate=$(date +%F) docs/index.adoc
+      run: |
+        docker run --rm -v $PWD:/documents/ \
+          asciidoctor/docker-asciidoctor:1.101 \
+          asciidoctor -B /documents/docs -b html5 --failure-level INFO -v docs/index.adoc \
+          --attribute=revnumber=${{ env.REVNUMBER }} \
+          --attribute=revdate=$(date +%F)
 
     - name: Copy license
       run: cp LICENSE.txt docs
diff --git a/docs/theme b/docs/theme
index e077a86..c6bcc86 160000
--- a/docs/theme
+++ b/docs/theme
@@ -1 +1 @@
-Subproject commit e077a86fcbc9de1039724b0a55ad307d566e2024
+Subproject commit c6bcc86efc60df24b0ef43541d546dbfce45d334