diff --git a/_Sidebar.md b/_Sidebar.md
index 06e4bdb..c321d79 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -1,7 +1,7 @@
 * [Introduction](Introduction)
 * [History](History)
 * [Goals](Goals)
-* [Hierarchical organization](Hierarchical organization)
+* [Hierarchical organization](Hierarchical-organization)
 * [Roles](Roles)
-* [Technical specifications](Technical specifications)
-* [**User guide**](User guide)
\ No newline at end of file
+* [Technical specifications](Technical-specifications)
+* [**User guide**](User-guide)
\ No newline at end of file