diff --git a/compose.yaml b/compose.yaml
index cf004a9..e58ff64 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -96,6 +96,7 @@ services:
     command:
       - '--config.file=/config/prometheus.yml'
       - '--storage.tsdb.path=/prometheus'
+      - '--storage.tsdb.retention.time=5y'
       - '--web.console.libraries=/etc/prometheus/console_libraries'
       - '--web.console.templates=/etc/prometheus/consoles'
       - '--web.enable-lifecycle'