diff --git a/05-monitoring/index.ts b/05-monitoring/index.ts
index 2faaa1e..85464f8 100644
--- a/05-monitoring/index.ts
+++ b/05-monitoring/index.ts
@@ -53,6 +53,8 @@ new k8s.helm.v3.Release(
       },
       prometheus: {
         prometheusSpec: {
+          retention: "7d",
+          retentionSize: "15GB",
           storageSpec: {
             volumeClaimTemplate: {
               spec: {