diff --git a/utils/docker/Dockerfile b/utils/docker/Dockerfile
index d0e94b1..2bcdc34 100755
--- a/utils/docker/Dockerfile
+++ b/utils/docker/Dockerfile
@@ -6,6 +6,8 @@
 WORKDIR /son-emu
 COPY . /son-emu/
 
+RUN apt-get clean
+
 RUN cd /son-emu/ansible \
     && ansible-playbook install.yml \
     && cd /son-emu \