diff --git a/src/main/resources/templates/index.html b/src/main/resources/templates/index.html
index 4688a81..4ca60cf 100644
--- a/src/main/resources/templates/index.html
+++ b/src/main/resources/templates/index.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html xmlns:th="https://www.thymeleaf.org">
+<html xmlns:th="https://www.thymeleaf.org" data-theme="dark">
     <head lang="en">
         <meta charset="UTF-8"/>
         <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
