diff --git a/kubernetes/apps/observability/kube-prometheus-stack/app/helmrelease.yaml b/kubernetes/apps/observability/kube-prometheus-stack/app/helmrelease.yaml
index e14d1356a..2b370f0be 100644
--- a/kubernetes/apps/observability/kube-prometheus-stack/app/helmrelease.yaml
+++ b/kubernetes/apps/observability/kube-prometheus-stack/app/helmrelease.yaml
@@ -254,7 +254,7 @@ spec:
         probeSelectorNilUsesHelmValues: false
         enableAdminAPI: true
         walCompression: true
-        retentionSize: 5GB
+        retentionSize: 2GB
         storageSpec:
           volumeClaimTemplate:
             spec: