diff --git a/ansible/roles/apps/templates/settings/prometheus-stack.yaml b/ansible/roles/apps/templates/settings/prometheus-stack.yaml
index a31be9716bc51001fcc47c2705794e308f0d522b..b73b1bc41a8a700d71ca7c01b49a39e083096b07 100644
--- a/ansible/roles/apps/templates/settings/prometheus-stack.yaml
+++ b/ansible/roles/apps/templates/settings/prometheus-stack.yaml
@@ -97,10 +97,11 @@ alertmanager:
 
 
 prometheus:
+  # https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus
   prometheusSpec:
     scrapeInterval: "3m"
     evaluationInterval: "3m"
-    retention: "10d"
+    retention: "30d"
 
 #    replicas: 2
 #    podAntiAffinity: "hard"
@@ -141,6 +142,7 @@ prometheus:
 #
 
 grafana:
+  # https://github.com/grafana/helm-charts/tree/main/charts/grafana
   adminPassword: "{{ grafana_admin_password }}"
   grafana.ini:
     server: