1 files changed, 1 insertions, 0 deletions
diff --git a/book.toml b/book.toml
index 6e71122..b680466 100644
--- a/book.toml
+++ b/book.toml
@@ -12,6 +12,7 @@ level = 1
 [output.html]
 theme = "my-theme"
 default-theme = "rust"
+preferred-dark-theme = "rust"
 
 [output.html.search]
 enable = true