diff --git a/config.toml b/config.toml
index 428edd8..b0b53d0 100644
--- a/config.toml
+++ b/config.toml
@@ -26,5 +26,6 @@
 
 [params]
   [params.theme_config]
+    appearance = "auto"
     back_home_text = ".."
     date_format = "2006-01-02"