diff --git a/hosts/osmium/configuration.nix b/hosts/osmium/configuration.nix
index 0fb1da2..dc437dc 100644
--- a/hosts/osmium/configuration.nix
+++ b/hosts/osmium/configuration.nix
@@ -33,7 +33,7 @@
   nix.gc = {
     automatic = true;
     dates = "weekly";
-    options = "--delete-older-than 400d";
+    options = "--delete-older-than 30d --max-freed 20G";
   };
 
   clerie.monitoring = {