diff --git a/book.toml b/book.toml
index 26a040e..c4d12af 100644
--- a/book.toml
+++ b/book.toml
@@ -11,3 +11,5 @@ no-section-label = true
 git-repository-url = "https://git.zinchuk.xyz/yuriy/joplin-mdbooks-website"
 git-repository-icon = "fa-gitlab"
 additional-css = ["static/custom.css"]
+default-theme = "rust"
+preferred-dark-theme = "navy"
\ No newline at end of file