diff --git a/home/packages/custom/update-nixos-system/default.nix b/home/packages/custom/update-nixos-system/default.nix
index 1ecdae3..eda7152 100644
--- a/home/packages/custom/update-nixos-system/default.nix
+++ b/home/packages/custom/update-nixos-system/default.nix
@@ -15,6 +15,6 @@ writeShellApplication {
     sudo nix-env -p /nix/var/nix/profiles/system --delete-generations +3
     nix-collect-garbage --delete-older-than 60d
     nix store gc
-    nix store optimize
+    nix store optimise
   '';
 }
diff --git a/home/packages/custom/update-system/default.nix b/home/packages/custom/update-system/default.nix
index 8f9bbf6..d7cdc47 100644
--- a/home/packages/custom/update-system/default.nix
+++ b/home/packages/custom/update-system/default.nix
@@ -17,6 +17,6 @@ writeShellApplication {
     nix-env --delete-generations +3
     nix-collect-garbage --delete-older-than 60d
     nix store gc
-    nix store optimize
+    nix store optimise
   '';
 }