diff --git a/web/pages/index.tsx b/web/pages/index.tsx
index 1696f2fbc6f..cccd32407e1 100644
--- a/web/pages/index.tsx
+++ b/web/pages/index.tsx
@@ -155,10 +155,6 @@ const HomePage: NextPage = observer(() => {
     }
   };
 
-  useEffect(() => {
-    setTheme("system");
-  }, [setTheme]);
-
   return (
     <DefaultLayout>
       {isLoading ? (