diff --git a/scripts/vault-kv-tree b/scripts/vault-kv-tree
index 85bcae3..3d20561 100755
--- a/scripts/vault-kv-tree
+++ b/scripts/vault-kv-tree
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Copyright (C) 2020, Maxim Lihachev, <envrm@yandex.ru>
+# Copyright (C) 2020-2022, Maxim Likhachev, <envrm@yandex.ru>
 #
 # This program is free software: you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by the Free
@@ -28,13 +28,25 @@ rstc="\033[00m"
 blue="\033[0;36m"
 green="\033[1;32m"
 
+function die() {
+	echo -e "$@" >&2
+	exit 1
+}
+
 vault_list() {
-	vault kv list -format=yaml "$1"
+	path=$1
+
+	shift
+
+	vault kv list -format=yaml "$@" "$path"
 }
 
 vault_keys() {
 	path=${1//\/\//\/}
-	keys=$(vault kv get -format=json "$path" 2>&- | jq -r -j '.data.data | keys | join("\n")' 2>&-)
+
+	shift
+
+	keys=$(vault kv get -format=json "$@" "$path" 2>&- | jq -r -j '.data.data | keys | join("\n")' 2>&-)
 
 	if [ -n "$keys" ]; then
 		while read -r key; do
@@ -45,27 +57,33 @@ vault_keys() {
 
 vault_tree() {
 	path=${1//\/\//\/}
-	list=$(vault_list "$path")
+
+	shift
+
+	list=$(vault_list "$path" "$@")
 
 	echo -e "${blue}${path}${rstc}"
 
 	if [ -n "$list" ] && [ "$list" != '{}' ]; then
 		while read -r dir; do
-			# printf "%s%s\n" "$INDENT" "$dir"
-			# echo "LIST ${path}/${dir#- }"
-			( vault_tree "${path}/${dir#- }"; )
+			( vault_tree "${path}/${dir#- }" "$@"; )
 		done <<<"$list"
-		# INDENT+="  "
 	else
-		:
-		vault_keys "$path"
+		vault_keys "$path" "$@"
 	fi
 }
 
+[[ "${BASH_VERSINFO[0]}" -lt 5 ]] && die "ERROR: Bash >= 5 required."
+
+DEPENDENCIES=(vault jq)
+
+for dependency in "${DEPENDENCIES[@]}"; do
+	command -V "$dependency" &>/dev/null || die "ERROR: The required '$dependency' command is not found."
+done
+
 if [ $# -eq 0 ]; then
-	echo "USAGE: $(basename "$0") [path]"
-	exit 1
+	die "USAGE: $(basename "$0") [path] [vault arguments...]"
 else
-	vault_tree "$1"
+	vault_tree "$@"
 fi