diff --git a/modules/prometheus/templates/prometheus.default.erb b/modules/prometheus/templates/prometheus.default.erb
index 28b35d8d..21f883ff 100644
--- a/modules/prometheus/templates/prometheus.default.erb
+++ b/modules/prometheus/templates/prometheus.default.erb
@@ -7,8 +7,9 @@ ARGS="--config.file=/opt/prometheus/prometheus.yml \
   --web.enable-lifecycle \
   --storage.tsdb.path=/srv/metrics \
   --storage.tsdb.no-lockfile \
-	--storage.tsdb.retention.time=14d \
-	--storage.tsdb.min-block-duration=2h \
-	--storage.tsdb.max-block-duration=2h \
+  --storage.tsdb.retention.time=365d \
+  --storage.tsdb.retention.size=50GB \
+  --storage.tsdb.min-block-duration=2h \
+  --storage.tsdb.max-block-duration=2h \
   --web.console.libraries=/scripts/prometheus/console_libraries \
   --web.console.templates=/scripts/prometheus/consoles"