diff --git a/Dockerfile b/Dockerfile
index 7127552..6b49cf7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,5 +9,5 @@ RUN apt-get update && \
     docker.io
 
 COPY layer2img.py /tmp/layer2img.py
-RUN python3 /tmp/layer2img.py -o /tmp/foo.pdf
-RUN rm /tmp/layer2img.py
+RUN python3 /tmp/layer2img.py -o /tmp/foo.pdf && \
+        rm /tmp/layer2img.py /tmp/foo.pdf