diff --git a/src/themes/BaseTheme.ts b/src/themes/BaseTheme.ts
index 3c346b8..52c40cf 100644
--- a/src/themes/BaseTheme.ts
+++ b/src/themes/BaseTheme.ts
@@ -19,7 +19,7 @@ declare module "@mui/material/styles" {
 
 const BaseThemeOptions /* : ThemeOptions */ = {
   cssVariables: {
-    colorSchemeSelector: "class",
+    colorSchemeSelector: "data-mode",
   },
   typography: {
     fontSize: 14,