diff --git a/.docker/Dockerfile b/.docker/Dockerfile
index dfa69e1f84710d8ca6fdcf945327e2f0a9517d86..418c68c6648eadc0dd41a0391b13dcd2c8cfcd6a 100644
--- a/.docker/Dockerfile
+++ b/.docker/Dockerfile
@@ -12,4 +12,4 @@ RUN apt-get update \
 		python3-sphinx \
 		python3-recommonmark \
 		doxygen
-RUN pip3 install breathe
+RUN pip3 install breathe sphinx-rtd-theme