diff --git a/docs/gitbook/install/flagger-install-on-eks-appmesh.md b/docs/gitbook/install/flagger-install-on-eks-appmesh.md
index e86dfc71..f53efc99 100644
--- a/docs/gitbook/install/flagger-install-on-eks-appmesh.md
+++ b/docs/gitbook/install/flagger-install-on-eks-appmesh.md
@@ -167,7 +167,7 @@ helm upgrade -i flagger flagger/flagger \
 --namespace=appmesh-system \
 --set crd.create=false \
 --set meshProvider=appmesh \
---set metricsServer=appmesh-prometheus:9090
+--set metricsServer=http://appmesh-prometheus:9090
 ```
 
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