diff --git a/prometheus/values.yaml b/prometheus/values.yaml
index ae9996d..194f6f1 100644
--- a/prometheus/values.yaml
+++ b/prometheus/values.yaml
@@ -117,6 +117,7 @@ prometheus:
     annotations:
       nginx.org/basic-auth-secret: prometheus-basic-auth-secret
   prometheusSpec:
+    retentionSize: "45GB"
     replicas: 2
     storageSpec:
       volumeClaimTemplate:
@@ -125,7 +126,7 @@ prometheus:
          accessModes: ["ReadWriteOnce"]
          resources:
            requests:
-             storage: 10Gi
+             storage: 50Gi
     ruleNamespaceSelector:
       matchLabels:
         prometheus: yolokube