diff --git a/docker/backend/Dockerfile b/docker/backend/Dockerfile
index 2ee110faf..a17020fb5 100644
--- a/docker/backend/Dockerfile
+++ b/docker/backend/Dockerfile
@@ -1,11 +1,8 @@
-# TODO: switch to uniworx registry debian image
-FROM debian:12.5
+FROM registry.uniworx.de/uniworx/containers/debian:12.5
 
-RUN apt-get -y update
-
-RUN apt-get -y install haskell-stack git
-RUN apt-get -y install alex g++ happy libghc-zlib-dev libpq-dev libsodium-dev locales locales-all pkg-config
-RUN apt-get -y install llvm
+RUN apt-get -y update && apt-get -y install haskell-stack git
+RUN apt-get -y update && apt-get -y install alex g++ happy libghc-zlib-dev libpq-dev libsodium-dev locales locales-all pkg-config
+RUN apt-get -y update && apt-get -y install llvm
 
 ENV LANG=en_US.UTF-8