diff --git a/.docker/Dockerfile b/.docker/Dockerfile
index 9573afc78e4386d92fd9ae9174f556d40cf7f05c..c3b8a10ff4c72435e0a07a7f6fcb2f7837bd989d 100644
--- a/.docker/Dockerfile
+++ b/.docker/Dockerfile
@@ -10,5 +10,7 @@ RUN apt-get install -y python3-pip
 
 COPY doc/requirements.txt requirements.txt
 RUN pip3 install -r requirements.txt
+
+RUN echo "deb ftp.de.debian.org/debian buster-backports main" > /etc/apt/sources.list.d/buster-backports.list
 RUN apt-get install -y cmake=3.16.3-3~bpo10+1