diff --git a/hugo-adoc/Dockerfile b/hugo-adoc/Dockerfile
index f17d6bf..c8354f4 100644
--- a/hugo-adoc/Dockerfile
+++ b/hugo-adoc/Dockerfile
@@ -24,6 +24,7 @@ FROM asciidoctor/docker-asciidoctor:1.82
 COPY --from=build /go/bin/hugo /usr/bin/hugo
 RUN gem install --no-document asciidoctor-html5s &&\
  apk update &&\
+ apk upgrade &&\
  apk add --no-cache \
    ca-certificates \
    git \