diff --git a/book/book.toml b/book/book.toml
index 244f106..18d74b1 100644
--- a/book/book.toml
+++ b/book/book.toml
@@ -95,6 +95,8 @@ monofontfallback = [
 linkcolor = "Links"
 urlcolor = "Links"
 urlstyle = "rm"
+documentclass = "book"
+fontsize = "11pt"
 geometry = "papersize={8in,10in},top=2cm,bottom=2cm,left=2.8cm,right=2.5cm"
 header-includes = [
   "\\definecolor{Links}{HTML}{6200EE}",