diff --git a/mkdocs.yml b/mkdocs.yml
index cf7c1870788cea3cc6156035f43085b36f25047d..0067516b0373c3943f27a8bee13380da1288ad07 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -16,6 +16,7 @@ repo_name: magnet/declearn
 markdown_extensions:
   - pymdownx.arithmatex:  # mathjax
       generic: true
+  - pymdownx.superfences  # code coloring
 
 extra:
   version: