diff --git a/modules/kubernetes/monitoring/prometheus_chart_values.tpl b/modules/kubernetes/monitoring/prometheus_chart_values.tpl
index 05ff192b..68a591e9 100644
--- a/modules/kubernetes/monitoring/prometheus_chart_values.tpl
+++ b/modules/kubernetes/monitoring/prometheus_chart_values.tpl
@@ -56,7 +56,7 @@ server:
   extraFlags:
   #  - "web.enable-admin-api"
     - "storage.tsdb.allow-overlapping-blocks"
-    - "storage.tsdb.retention.size=1GB"
+    # - "storage.tsdb.retention.size=1GB"
   persistentVolume:
     # enabled: false
     existingClaim: prometheus-iscsi-pvc