diff --git a/_Sidebar.md b/_Sidebar.md
index 0b14338..41c92a7 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -1,2 +1,2 @@
  * [main topic A](Topic1)
- * [main topic B](topic 2)
\ No newline at end of file
+ * [main topic B](topic-2)
\ No newline at end of file