diff --git a/documentation/Dockerfile b/documentation/Dockerfile
index eac5810c..4ae1a2a8 100644
--- a/documentation/Dockerfile
+++ b/documentation/Dockerfile
@@ -3,5 +3,6 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y python3-
     python3-pip texlive-fonts-recommended latexmk \
     texlive-latex-extra texlive-latex-recommended make php-cli php-xml composer \
     texlive-xetex texlive-fonts-extra-links texlive-fonts-extra \
-    nodejs npm libgbm1 libasound2 wget
+    nodejs npm libgbm1 libasound2 wget python3-sphinx python3-sphinx-rtd-theme \
+    && python3 -m pip install sphinx-rtd-dark-mode