diff --git a/book b/book
deleted file mode 160000
index 150b745c..00000000
--- a/book
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 150b745c2d1263673a8c74aa6c6e7ec8dde8f2c8
diff --git a/book.toml b/book.toml
index 123a57b3..40c30787 100644
--- a/book.toml
+++ b/book.toml
@@ -15,6 +15,7 @@ no-section-label = true
 additional-css = ["static/custom.css"]
 additional-js = ["static/script.js"]
 default-theme = "light"
+mathjax-support = true
 
 [output.html.fold]
 enable = true