diff --git a/book/_config.yml b/book/_config.yml
index f5c1433..821fbcf 100644
--- a/book/_config.yml
+++ b/book/_config.yml
@@ -6,9 +6,6 @@ copyright: Delft University of Technology, CC BY 4.0 # overriden by extra footer
 execute:
   execute_notebooks: "off"
 
-launch_buttons:
-  thebe: true
-
 only_build_toc_files: true
 
 html:
@@ -23,6 +20,8 @@ sphinx:
     thebe_config:
       use_thebe_lite: true
       exclude_patterns: ["**/_*.yml", "**/*.md", "**/*.ipynb"]
+    launch_buttons:
+      thebe: true
   extra_extensions:
     - sphinx.ext.imgconverter
     - download_link_replacer