diff --git a/config/zsh/aliases.zsh b/config/zsh/aliases.zsh
index 506ad1c..f7a4fde 100644
--- a/config/zsh/aliases.zsh
+++ b/config/zsh/aliases.zsh
@@ -80,8 +80,9 @@ function upgrade() {
     rm -rf /var/cache/pkg/* /usr/ports/distfiles/*
     pkg audit -F
   else
-    case $(lsb_release -si) in
+    case $(lsb_release -si 2>/dev/null) in
       Gentoo) eix-sync && eix-update && emerge -avuNDU @world ;;
+      Ubuntu) apt update && apt upgrade ;;
       VoidLinux) xbps-install -Su && xbps-remove -RoO && xlocate -S && du -sh /var/cache/xbps && rm -rf /var/cache/xbps/* ;;
     esac
   fi