diff --git a/scripts/e2e/greptimedb-cluster.sh b/scripts/e2e/greptimedb-cluster.sh
index 61f292c..a7e3ec5 100755
--- a/scripts/e2e/greptimedb-cluster.sh
+++ b/scripts/e2e/greptimedb-cluster.sh
@@ -53,7 +53,7 @@ function drop_table() {
 
 function deploy_greptimedb_cluster() {
   # Handle greptimedb-cluster dependencies.
-  helm repo add grafana https://grafana.github.io/helm-charts
+  helm repo add grafana https://grafana.github.io/helm-charts --force-update
   helm dependency build charts/greptimedb-cluster
 
   # Deploy greptimedb cluster.