diff --git a/.docker/Dockerfile b/.docker/Dockerfile
index aac81f4399c05ffecf4163c33cab8f50b704f6ff..f97ec8e0ee4639fc4d6998f94c81e4b610d3580f 100644
--- a/.docker/Dockerfile
+++ b/.docker/Dockerfile
@@ -13,5 +13,5 @@ RUN pip3 install -r requirements.txt
 
 RUN echo "deb http://ftp.de.debian.org/debian buster-backports main" > /etc/apt/sources.list.d/buster-backports.list
 RUN apt-get update
-RUN apt-get install -y cmake=3.16.3-3~bpo10+1
+RUN apt-get install -y cmake=3.16.3-3~bpo10+1/buster-backports