diff --git a/.forgejo/workflows/doc.yaml b/.forgejo/workflows/doc.yaml
index 794889e..58aadfa 100644
--- a/.forgejo/workflows/doc.yaml
+++ b/.forgejo/workflows/doc.yaml
@@ -3,7 +3,7 @@ jobs:
   build-doc:
     runs-on: docker
     container:
-      image: git.tkolb.de/amateurfunk/hamnet70/asciidoctor:1.3
+      image: git.tkolb.de/amateurfunk/hamnet70/asciidoctor:1.4
     steps:
       - uses: actions/checkout@v4
       - run: pwd && ls -hla && cd doc && make