diff --git a/book/_config.yml b/book/_config.yml
index 409f9b0..2c6585c 100644
--- a/book/_config.yml
+++ b/book/_config.yml
@@ -2,7 +2,7 @@ title: TeachBooks Manual
 author: TeachBooks Development Team and TeachBooks users, built with <a href="https://teachbooks.io/">TeachBooks</a>, <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank" rel="license noopener noreferrer"">CC BY 4.0<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg" alt=""><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/by.svg" alt=""></a>
 
 execute:
-  execute_notebooks: 'off'
+  execute_notebooks: 'auto'
 
 only_build_toc_files: true