diff --git a/_config.yml b/_config.yml
index d4cdb8c..075c249 100644
--- a/_config.yml
+++ b/_config.yml
@@ -1,14 +1,9 @@
 name: University of Bremen -- Python Tutorials
 theme: jekyll-theme-Hacker
-use_math: true
 
-highlighter: rouge
 markdown: kramdown
+
 kramdown:
   math_engine: mathjax
-  input: GFM
-  auto_ids: true
-  hard_wrap: false
-  syntax_highlighter: rouge