diff --git a/config.toml b/config.toml
index 4c497a4..bd9bac8 100644
--- a/config.toml
+++ b/config.toml
@@ -5,6 +5,7 @@ theme = 'hugo-book'
 enableGitInfo = true
 
 [params]
+	BookTheme = 'auto'
 	BookLogo = 'logo.svg'
 	BookRepo = 'https://git.edgarpierre.fr/edpibu/blog'
 	BookDateFormat = '2006-01-02'