diff --git a/_Sidebar.md b/_Sidebar.md
index ab501c0..95f4972 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -15,8 +15,8 @@
 - [[Cell|cell-api]]
 - [[Keyboard|keyboard-api]]
 - [[Mouse|mouse-api]]
-- [[Termbox|termbox-api]]
 - [[Terminal|terminal-api]]
+  - [[Termbox|termbox-api]]
 
 ### Infrastructure layer