diff --git a/book.toml b/book.toml
index 088c2c1..743ce46 100644
--- a/book.toml
+++ b/book.toml
@@ -1,5 +1,5 @@
 [book]
 title = "Sandbox Documentation"
 language = "en"
-[theme]
-name = "light"
\ No newline at end of file
+[output.html]
+default-theme = "light"
\ No newline at end of file