diff --git a/docs/mathjax.md b/docs/mathjax.md
index 6cae0513..b4c092e9 100644
--- a/docs/mathjax.md
+++ b/docs/mathjax.md
@@ -1,8 +1,6 @@
 # MathJax
 
 - [PyMdown - Material for MkDocs](https://squidfunk.github.io/mkdocs-material/extensions/pymdown/#arithmatex-mathjax)
-    - この設定に変える必要あり。現在は下でやってる。2018/10/3
-- [MathJax with MkDocs](https://qiita.com/mebiusbox2/items/a61d42878266af969e3c#-%E6%95%B0%E5%BC%8F)