diff --git a/configs/container_config.nix b/configs/container_config.nix
index 48ff9c4..9cbdb1d 100644
--- a/configs/container_config.nix
+++ b/configs/container_config.nix
@@ -96,6 +96,15 @@
     };
   };
 
+  # garbage collection & optimization
+  nix.optimise.automatic = true;
+  nix.optimise.dates = [ "03:45" ]; # Optional; allows customizing optimisation schedule
+
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 30d";
+  };
 
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions