diff --git a/README.md b/README.md
index d089d1b..140ddf0 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ How is `cog-runtime` formed?
 ```mermaid
 sequenceDiagram
     participant r8
-    participant server as coggo-server
+    participant server as cog-server
     participant runner as coglet
     participant predictor as Predictor
     r8->>server: Boot