diff --git a/.github/depup.sh b/.github/depup.sh
index 3b93b66..18f84df 100755
--- a/.github/depup.sh
+++ b/.github/depup.sh
@@ -7,13 +7,13 @@ set -eu
 # cleanup temporary directory
 unset tmpdir
 atexit() {
-  [[ -n ${tmpdir-} ]] && rm -f "$tmpdir"
+  [[ -n ${tmpdir-} ]] && rm -rf "$tmpdir"
 }
 trap atexit EXIT
 trap 'rc=$?; trap - EXIT; atexit; exit $?' INT PIPE TERM
 
-tempdir=$(mktemp -d)
+tmpdir=$(mktemp -d)
 
 # sync install.sh with https://github.com/reviewdog/action-setup
-curl -sSL https://raw.githubusercontent.com/reviewdog/action-setup/master/install.sh -o "$tempdir/install.sh"
-install -m 755 "$tempdir/install.sh" "$CURRENT/../install.sh"
+curl -sSL https://raw.githubusercontent.com/reviewdog/action-setup/master/install.sh -o "$tmpdir/install.sh"
+install -m 755 "$tmpdir/install.sh" "$CURRENT/../install.sh"