diff --git a/notice/api/3.0.md b/notice/api/3.0.md
index 37a7e68..1627630 100644
--- a/notice/api/3.0.md
+++ b/notice/api/3.0.md
@@ -49,7 +49,7 @@ Plan
 [**V.** Type Checker](#v-type-checker)
 
 - [**1** Default Types](#1---default-types)
-- [**2** Complex Types](#1---complex-types)
+- [**2** Complex Types](#2---complex-types)
 
 
 # **I.** Overview