diff --git a/packages/ui/src/models/THEME.ts b/packages/ui/src/models/THEME.ts
index f562dfcf8..64c70e6e9 100644
--- a/packages/ui/src/models/THEME.ts
+++ b/packages/ui/src/models/THEME.ts
@@ -3,4 +3,4 @@ export enum THEME {
     LIGHT = 'LIGHT'
 }
 
-export type Theme = THEME | 'SYSTEM';
+export type Theme = `${THEME}` | 'SYSTEM';