diff --git a/mkdocs.yml b/mkdocs.yml
index 759fe2a1a..1b12db12b 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -45,7 +45,7 @@ extra:
       lang: zh
 
 extra_css:
-  - assets/css/colours.css
+  - public/css/colours.css
 
 markdown_extensions:
   - admonition