diff --git a/book/book.toml b/book/book.toml
index 8e771b5..990213c 100644
--- a/book/book.toml
+++ b/book/book.toml
@@ -55,7 +55,7 @@ linkcolor = "Links"
 urlcolor = "Links"
 urlstyle = "rm"
 documentclass = "book"
-fontsize = "11pt"
+fontsize = "10pt"
 geometry = "papersize={8in,10in},top=2cm,bottom=2cm,left=2.4cm,right=2.4cm"
 header-includes = [
   "\\definecolor{Links}{HTML}{6200EE}",
@@ -96,7 +96,7 @@ linkcolor = "Links"
 urlcolor = "Links"
 urlstyle = "rm"
 documentclass = "book"
-fontsize = "11pt"
+fontsize = "10pt"
 geometry = "papersize={8in,10in},top=2cm,bottom=2cm,left=2.8cm,right=2.5cm"
 header-includes = [
   "\\definecolor{Links}{HTML}{6200EE}",