diff --git a/appendix b/appendix
index f359f1c..efe0ec2 100644
--- a/appendix
+++ b/appendix
@@ -12,3 +12,4 @@ RUN mandb
 RUN chmod +x ${REPO_DIR}/rocker.sh && ${REPO_DIR}/rocker.sh
 
 # stay as root
+RUN echo 'root:Docker!' | chpasswd