diff --git a/Dockerfile b/Dockerfile
index c36ffd5..6650c3a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -45,6 +45,8 @@ ADD ./Dockerfile_requirements.txt /root/
 WORKDIR /root/
 RUN pip3 install --upgrade pip
 RUN pip3 install -r Dockerfile_requirements.txt
+
+# clean everything
 RUN rm -rf /root/*
 
 # change python to python3