diff --git a/.docker/Dockerfile b/.docker/Dockerfile
index ca335748..5191af3b 100644
--- a/.docker/Dockerfile
+++ b/.docker/Dockerfile
@@ -3,12 +3,11 @@ FROM  qgis/qgis:${QGIS_TEST_VERSION}
 MAINTAINER Matthias Kuhn <matthias@opengis.ch>
 
 RUN apt-get update \
-    && apt-get install -y \
-         python3-pip \
+    && apt-get install -y python3-pip \
     && rm -rf /var/lib/apt/lists/*
 
 COPY ./requirements.txt /tmp/
-RUN pip3 install -r /tmp/requirements.txt
+RUN pip3 install -r /tmp/requirements.txt --break-system-packages
 
 ENV LANG=C.UTF-8