diff --git a/values/overrides.yaml b/values/overrides.yaml
index f389b46..98ad2d7 100644
--- a/values/overrides.yaml
+++ b/values/overrides.yaml
@@ -4146,11 +4146,11 @@ prometheus:
 
     ## How long to retain metrics
     ##
-    retention: 11d
+    retention: 10d
 
     ## Maximum size of metrics
     ##
-    retentionSize: "10"
+    retentionSize: "10GB"
 
     ## Allow out-of-order/out-of-bounds samples ingested into Prometheus for a specified duration
     ## See https://prometheus.io/docs/prometheus/latest/configuration/configuration/#tsdb