diff --git a/README.md b/README.md
index ce62f9bd148300a91bec26bb15ed26d87834f9cc..9e56d5ebe1b2b2eb9d5aadf19ba2b8720482a6c3 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,6 @@ Each parts can be used independetly for users' needs.
 **Shengkang Chen**
 
 
-## Graph
+## CoLo Structure
 ![CoLo Structure](CoLo Structure.jpg?raw=true)
-### CoLo Structure
+