diff --git a/home/programs/zsh/zshrc b/home/programs/zsh/zshrc
index 4898c10..a686b6d 100644
--- a/home/programs/zsh/zshrc
+++ b/home/programs/zsh/zshrc
@@ -206,6 +206,7 @@ alias ndwl="nmcli device wifi list"
 alias wt="systemctl restart NetworkManager"
 alias syncthing="firefox localhost:8384"
 alias htop="btop" # of course
+alias top="btop" # of course
 
 stack() {
   find . -type f -exec echo -e "\n--- {} ---\n" \; -exec cat {} \;
diff --git a/system/system.nix b/system/system.nix
index ecd9dcc..d53754b 100644
--- a/system/system.nix
+++ b/system/system.nix
@@ -14,7 +14,8 @@
   ];
 
   # Set your time zone.
-  time.timeZone = "America/New_York";
+  # time.timeZone = "America/New_York";
+  time.timeZone = "Asia/Seoul";
 
   # Select internationalisation properties.
   i18n.defaultLocale = "en_US.UTF-8";