diff --git a/docs/overview/component/agent.md b/docs/overview/component/agent.md
index 1cf33ad534..8a61299fae 100644
--- a/docs/overview/component/agent.md
+++ b/docs/overview/component/agent.md
@@ -74,9 +74,9 @@ You have to wait to complete the CreateIndex and SaveIndex functions before sear
 
 This image shows the mechanism to create NGT index.
 
-<img src="../../../assets/docs/overview/component/agent/ngt.png" />
+<img src="../../../assets/docs/overview/component/agent/ngt.png" alt="NGT Index Creation Mechanism" />
 
-Please refer to [Go Doc](https://pkg.go.dev/github.com/vdaas/vald@v1.3.1/pkg/agent/core/ngt/service) for other functions.
+Please refer to [Go Doc](https://pkg.go.dev/github.com/vdaas/vald@VERSION@/pkg/agent/core/ngt/service) for other functions.
 
 #### Vald Agent Faiss