diff --git a/group_vars/stage_dev/plain.yml b/group_vars/stage_dev/plain.yml
index df19d65..4b6e55c 100644
--- a/group_vars/stage_dev/plain.yml
+++ b/group_vars/stage_dev/plain.yml
@@ -375,3 +375,5 @@ webdav_opentracing_jaeger_enabled: true
 webdav_opentracing_jaeger_http_sender_url: "http://{{ shared_service_kube_jaeger_collector_hostname }}/api/traces"
 connect_opentracing_jaeger_enabled: true
 connect_opentracing_jaeger_http_sender_url: "http://{{ shared_service_kube_jaeger_collector_hostname }}/api/traces"
+
+prometheus_tsdb_rentention_time: '2w'
diff --git a/roles/prometheus/vars/main.yml b/roles/prometheus/vars/main.yml
index c0c31a0..1f4140e 100644
--- a/roles/prometheus/vars/main.yml
+++ b/roles/prometheus/vars/main.yml
@@ -52,7 +52,7 @@ prometheus_docker: {
         '"--web.console.templates=/usr/share/prometheus/consoles"',
         '"--web.external-url={{ http_s}}://{{ inventory_hostname }}-prometheus.{{ domain }}"',
         '"--web.enable-lifecycle"',
-        '"--storage.tsdb.retention.time=4w"',
+        '"--storage.tsdb.retention.time={{ prometheus_tsdb_rentention_time | default("4w")}}"',
       ],
       volumes: [
         '"./config/prometheus/:/etc/prometheus/:ro"',