diff --git a/home-manager/default.nix b/home-manager/default.nix
index f2e6432..792f839 100644
--- a/home-manager/default.nix
+++ b/home-manager/default.nix
@@ -10,7 +10,7 @@ let
   darwinPkgs = import ./packages/darwin { inherit pkgs; };
   nixosPkgs = import ./packages/nixos { inherit pkgs; };
 in {
-  home.stateVersion = "23.11";
+  home.stateVersion = "24.11";
   home.packages = basicPkgs ++ lib.optionals pkgs.stdenv.isDarwin darwinPkgs
     ++ lib.optionals pkgs.stdenv.isLinux nixosPkgs;
 }
diff --git a/nix-on-droid/default.nix b/nix-on-droid/default.nix
index f3d02eb..b627b1f 100644
--- a/nix-on-droid/default.nix
+++ b/nix-on-droid/default.nix
@@ -3,7 +3,7 @@
 
   time.timeZone = "Asia/Tokyo";
 
-  system.stateVersion = "23.11";
+  system.stateVersion = "24.11";
 
   nix.extraOptions = ''
     experimental-features = nix-command flakes
diff --git a/nix-on-droid/home.nix b/nix-on-droid/home.nix
index 3e82459..0cced39 100644
--- a/nix-on-droid/home.nix
+++ b/nix-on-droid/home.nix
@@ -1,6 +1,6 @@
 { config, lib, pkgs, system, nixpkgs, emacs-overlay, ... }: {
   home = {
-    stateVersion = "23.11";
+    stateVersion = "24.11";
     packages = import ../home-manager { inherit system nixpkgs emacs-overlay; };
   };
 }
diff --git a/nixos/default.nix b/nixos/default.nix
index 95a4349..8a46d55 100644
--- a/nixos/default.nix
+++ b/nixos/default.nix
@@ -84,7 +84,7 @@
 
   nix = {
     gc.automatic = true;
-    gc.options = "--delete-older-than 5d";
+    gc.options = "--delete-older-than 3d";
   };
   nixpkgs = { config.allowUnfree = true; };
 
@@ -110,7 +110,7 @@
   };
 
   system = {
-    stateVersion = "23.11";
+    stateVersion = "24.11";
 
     # MEMO: 有効にしたい
     autoUpgrade.enable = false;