diff --git a/prom-stack-values.yaml b/prom-stack-values.yaml
index 84a1336..926aefb 100644
--- a/prom-stack-values.yaml
+++ b/prom-stack-values.yaml
@@ -19,6 +19,8 @@ alertmanager:
 
 prometheus:
   prometheusSpec:
+    retention: '7d'
+    retentionSize: "10GB"
     ## Prometheus StorageSpec for persistent data
     ## ref: https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/user-guides/storage.md
     storageSpec: