diff --git a/configuration.nix b/configuration.nix
index fe9e412..58580e2 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -25,7 +25,7 @@
     autoOptimiseStore = true;
     gc = {
       automatic = true;
-      options = "--delete-older-than 7d";
+      options = "--delete-older-than 14d";
     };
     extraOptions = ''
       keep-outputs = true