diff --git a/tmpl/prometheus.defaults b/tmpl/prometheus.defaults
index dbf1dc5..f99b235 100644
--- a/tmpl/prometheus.defaults
+++ b/tmpl/prometheus.defaults
@@ -1 +1 @@
-PROMETHEUS_OPTS='--config.file=/etc/prometheus/prometheus.yml --storage.tsdb.path=/var/lib/prometheus/data --storage.local.retention=%%{promStorageRetention}h'
+PROMETHEUS_OPTS='--config.file=/etc/prometheus/prometheus.yml --storage.tsdb.path=/var/lib/prometheus/data'