diff --git a/docs/system/system.md b/docs/system/system.md
index 377729d..cf0866e 100644
--- a/docs/system/system.md
+++ b/docs/system/system.md
@@ -2,13 +2,13 @@
 # System
 
 ### In this section
-[About](#About)
+[About](#about)
 
-[Implementation](#Implementation)
+[Implementation](#implementation)
 
-[Examples](#Examples)
+[Examples](#examples)
 
-[Notes](#Notes)
+[Notes](#notes)
 
 
 ## About