diff --git a/defaults/main.yml b/defaults/main.yml
index 76417a5..60ef850 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -1,6 +1,6 @@
 ---
 prometheus_install: True
-prometheus_version: 2.23.0
+prometheus_version: 2.21.1
 prometheus_user: prometheus
 prometheus_home: /opt/prometheus
 prometheus_dist_dir: '{{ prometheus_home }}/dist'
@@ -8,4 +8,4 @@ prometheus_confdir: '/opt/prometheus/conf'
 prometheus_cmd: '{{ prometheus_dist_dir }}/{{ prometheus_dir }}/prometheus'
 prometheus_loglevel: info
 prometheus_http_port: 9090
-prometheus_opts: '--storage.tsdb.retention=360d'
+prometheus_opts: '--storage.tsdb.retention=120d'