diff --git a/systems/etna/metrics.nix b/systems/etna/metrics.nix
index 43c9e63..35dc42d 100644
--- a/systems/etna/metrics.nix
+++ b/systems/etna/metrics.nix
@@ -33,7 +33,7 @@ in {
   services.victoriametrics = {
     enable = true;
     listenAddress = "127.0.0.1:9090";
-    retentionPeriod = 5 * 12; # 5 years !!!!
+    retentionPeriod = "5y";
   };
 
   services.vmagent = {