diff --git a/frontend/src/types/tree.ts b/frontend/src/types/tree.ts
index 1dae8a5a..c9674902 100644
--- a/frontend/src/types/tree.ts
+++ b/frontend/src/types/tree.ts
@@ -1,7 +1,7 @@
 import type { CategoryInfo } from './category'
 
 // Tree node types
-export type NodeType = 'decision' | 'action' | 'solution'
+export type NodeType = 'decision' | 'action' | 'solution' | 'answer'
 
 export interface TreeOption {
   id: string