diff --git a/Dockerfile b/Dockerfile
index af41435..419bbac 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@ WORKDIR /book
 # fix EPUB rendering: https://github.com/sphinx-doc/sphinx/issues/11598
 RUN \
   pacman -Sy --needed --noconfirm archlinux-keyring \
-  && pacman -Syu --needed --noconfirm inkscape make noto-fonts patch python-myst-parser python-sphinx python-sphinxext-opengraph ttf-montserrat \
+  && pacman -Syu --needed --noconfirm inkscape make noto-fonts patch python-myst-parser python-sphinx python-sphinxext-opengraph python-sphinx-sitemap ttf-montserrat \
   && patch -Np1 -d /usr/lib/python3.11/site-packages/ -i /book/patches/sphinx-11766.patch \
   && make epub html