diff --git a/cleanup/cleanup.sh b/cleanup/cleanup.sh
index f7b865d..f50fea5 100644
--- a/cleanup/cleanup.sh
+++ b/cleanup/cleanup.sh
@@ -10,8 +10,8 @@ find /var/tmp -type d -name 'systemd-*-systemd-timesyncd.service*' -exec rm -rf
 find /var/lib/apt -type f -delete
 find /var/cache/apt -type f -delete
 find /var/log -type f -regextype posix-extended -regex '.*\.(gz|xz|[0-9])' -delete
-truncate -s0 $HOME/.bash_history
-[ -w $HOME/.zsh_history ] && truncate -s0 $HOME/.zsh_history
+truncate -s0 "$HOME"/.bash_history
+[ -w "$HOME"/.zsh_history ] && truncate -s0 "$HOME"/.zsh_history
 find /var/log -type f -exec truncate -s0 '{}' '+'
 dd if=/dev/zero of=/emptyfile oflag=dsync status=progress bs=4M;
 rm -f /emptyfile;