diff --git a/config_automation.yml b/config_automation.yml
index d101043..4cc4b8d 100644
--- a/config_automation.yml
+++ b/config_automation.yml
@@ -21,6 +21,10 @@ render-website: rmd
 render-leanpub: yes
 render-coursera: yes
 
+## Automate the creation of Book.txt file? yes/no
+## This is only relevant if render-leanpub is yes, otherwise it will be ignored
+make-book-txt: yes
+
 # What docker image should be used for rendering?
-# The default is jhudsl/course_template:main
-rendering-docker-image: 'jhudsl/course_template:main'
+# The default is jhudsl/base_ottr:main
+rendering-docker-image: 'jhudsl/base_ottr:main'