diff --git a/Makefile b/Makefile
index 11b1aaf..94849eb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+SHELL := /bin/bash # Use bash syntax
+
 # if not run in travis, get docker_login and _pwd from file
 ifndef TRAVIS
 	docker_repo := zokradonh
@@ -174,6 +176,7 @@ tag-all: build-all ## Helper target to create tags for all images.
 
 tag-container: component ?= base
 tag-container: ## Helper target to tag a given image. Defaults to the base image.
+	# TODO how to tag additional releases. e.g. also tag 8.7.80.1035 as 8.7.80?
 	@echo 'create tag $($(component)_version)'
 	docker tag $(docker_repo)/kopano_$(component) $(docker_repo)/kopano_$(component):${$(component)_version}
 	@echo $(docker_repo)/kopano_$(component):${$(component)_version} >> $(TAG_FILE)
diff --git a/build/Dockerfile b/build/Dockerfile
index 377d824..650f016 100644
--- a/build/Dockerfile
+++ b/build/Dockerfile
@@ -1,6 +1,12 @@
-FROM docker:18.09.1
+FROM docker:18.09.6
 ENV COMPOSE_VERSION "1.23.2"
+ENV REG_VERSION "0.16.0"
 RUN apk add --no-cache bash curl expect make nano jq py-pip
 RUN pip install --no-cache-dir docker-compose==${COMPOSE_VERSION}
+# the 0.16.0 release of reg has a bug that breaks loading tags from the docker hub.
+# issue is fixed in master, but not in a release.
+# rel https://github.com/genuinetools/reg/issues/186
+RUN curl -fSL "https://github.com/genuinetools/reg/releases/download/v$REG_VERSION/reg-linux-amd64" -o "/usr/local/bin/reg" \
+    && chmod a+x "/usr/local/bin/reg"
 WORKDIR /kopano-docker
 CMD ["bash"]
diff --git a/setup-update-tag.sh b/setup-update-tag.sh
new file mode 100755
index 0000000..b32788e
--- /dev/null
+++ b/setup-update-tag.sh
@@ -0,0 +1,118 @@
+#!/bin/bash
+
+set -euo pipefail
+IFS=$'\n\t'
+
+if ! command -v reg > /dev/null; then
+	echo "Please install reg in order to run this script."
+	exit 1
+fi
+
+if [ ! -e ./.env ]; then
+	echo "please run setup.sh first"
+	exit 1
+fi
+
+# this is a kind of ugly hack to be able to source the env file
+# this is sadly needed since postfix in https://github.com/tomav/docker-mailserver/ cannot deal with quoted values
+tmpfile=$(mktemp /tmp/kopano-docker-env.XXXXXX)
+cp ./.env "$tmpfile"
+sed -i '/LDAP_QUERY_FILTER/s/^/#/g' "$tmpfile"
+sed -i '/SASLAUTHD_LDAP_FILTER/s/^/#/g' "$tmpfile"
+# shellcheck disable=SC1090
+source "$tmpfile"
+
+# define a default docker_repo in case its not in .env
+docker_repo=${docker_repo:-zokradonh}
+
+docker_tag_search () {
+	image="$1"
+	results=$(reg tags "$image" 2> /dev/null)
+	echo "$results" | xargs -n1 | sort -ru
+}
+
+# function from https://stackoverflow.com/a/42790579/4754613
+selectWithDefault() {
+
+	local item i=0 numItems=$#
+
+	# Print numbered menu items, based on the arguments passed.
+	for item; do         # Short for: for item in "$@"; do
+		printf '%s\n' "$((++i))) $item"
+	done >&2 # Print to stderr, as `select` does.
+
+	# Prompt the user for the index of the desired item.
+	while :; do
+		printf %s "${PS3-#? }" >&2 # Print the prompt string to stderr, as `select` does.
+		read -r index
+		# Make sure that the input is either empty or that a valid index was entered.
+		[[ -z $index ]] && break  # empty input
+		(( index >= 1 && index <= numItems )) 2>/dev/null || { echo "Invalid selection. Please try again." >&2; continue; }
+		break
+	done
+
+	# Output the selected item, if any.
+	[[ -n $index ]] && printf %s "${@: index:1}"
+}
+
+update_env_file () {
+	varname="$1"
+	varvalue="$2"
+	if ! grep -q "$varname" ./.env; then
+		echo "$varname=$varvalue" >> ./.env
+	else
+		sed -i "/$varname/c $varname=$varvalue" ./.env
+	fi
+}
+
+tag_question () {
+	containername="$1"
+	value_default="$2"
+	description="$3"
+	echo "Which tag do you want to use for $description? [$value_default]"
+	echo "Available tags in $docker_repo/$containername/: "
+	set +e # do not exit when new_value is empty
+	# shellcheck disable=SC2046
+	new_value=$(selectWithDefault $(docker_tag_search "$docker_repo/$containername"))
+	set -e
+	return_value=${new_value:-$value_default}
+}
+
+echo "Please be aware that downgrading to an older version could result in failure to start!"
+
+tag_question kopano_core "${CORE_VERSION:-latest}" "Kopano Core components"
+update_env_file CORE_VERSION "$return_value"
+
+tag_question kopano_webapp "${WEBAPP_VERSION:-latest}" "Kopano WebApp"
+update_env_file WEBAPP_VERSION "$return_value"
+
+tag_question kopano_web "${KWEB_VERSION:-latest}" "reverse proxy"
+update_env_file KWEB_VERSION "$return_value"
+
+tag_question kopano_zpush "${ZPUSH_VERSION:-latest}" "Z-Push"
+update_env_file ZPUSH_VERSION "$return_value"
+
+tag_question kopano_kdav "${KDAV_VERSION:-latest}" "kDAV"
+update_env_file KDAV_VERSION "$return_value"
+
+tag_question kopano_konnect "${KONNECT_VERSION:-latest}" "Kopano Konnect"
+update_env_file KONNECT_VERSION "$return_value"
+
+tag_question kopano_kwmserver "${KWM_VERSION:-latest}" "Kopano Kwmserver"
+update_env_file KWM_VERSION "$return_value"
+
+tag_question kopano_meet "${MEET_VERSION:-latest}" "Kopano Meet"
+update_env_file MEET_VERSION "$return_value"
+
+tag_question kopano_scheduler "${SCHEDULER_VERSION:-latest}" "Scheduler"
+update_env_file SCHEDULER_VERSION "$return_value"
+
+tag_question kopano_ssl "${SSL_VERSION:-latest}" "SSL helper container"
+update_env_file SSL_VERSION "$return_value"
+
+tag_question kopano_ldap "${LDAP_VERSION:-latest}" "LDAP container"
+update_env_file LDAP_VERSION "$return_value"
+
+if [ -e "$tmpfile" ]; then
+	rm "$tmpfile"
+fi
diff --git a/setup.sh b/setup.sh
index 4512586..fe96963 100755
--- a/setup.sh
+++ b/setup.sh
@@ -30,37 +30,8 @@ plugin_menu() {
 }
 
 docker_tag_search () {
-	set +e
-	# Display help
-	if [[ "${1}" == "" ]]; then
-		echo "Usage: docker tags repo/image"
-		echo "       docker tags image"
-		return
-	fi
-
-	# Full repo/image was supplied
-	if [[ $1 == *"/"* ]]; then
-		name=$1
-
-	# Only image was supplied, default to library/image
-	else
-		name=library/${1}
-	fi
-	#printf "Searching tags for ${name}"
-
-	# Fetch all pages, because the only endpoint supporting pagination params
-	# appears to be tags/lists, but that needs authorization
-	results=""
-	i=0
-	has_more=0
-	while [ $has_more -eq 0 ]; do
-		i=$((i+1))
-		result=$(curl "https://registry.hub.docker.com/v2/repositories/${name}/tags/?page=${i}" 2>/dev/null | jq -r '."results"[]["name"]' 2>/dev/null)
-		has_more=$?
-		if [[ -n "${result// }" ]]; then results="${results} ${result}"; fi
-			#printf "."
-	done
-
+	image="$1"
+	results=$(reg tags "$image" 2> /dev/null)
 	echo "$results" | xargs -n1 | sort -ru | xargs
 }
 
@@ -73,28 +44,30 @@ if [ ! -e ./.env ]; then
 	PRINT_SETUP_SUCCESS=""
 
 	echo "Creating an .env file for you"
-	if command -v jq > /dev/null; then
-		echo "Available tags in https://hub.docker.com/r/zokradonh/kopano_core/: $(docker_tag_search zokradonh/kopano_core)"
+
+	# if the optional https://github.com/genuinetools/reg is installed this will list available tags
+	if command -v reg > /dev/null; then
+		echo "Available tags in zokradonh/kopano_core/: $(docker_tag_search zokradonh/kopano_core)"
 	fi
 	value_default=latest
 	read -r -p "Which tag do you want to use for Kopano Core components? [$value_default]: " new_value
 	CORE_VERSION=${new_value:-$value_default}
 
-	if command -v jq > /dev/null; then
+	if command -v reg > /dev/null; then
 		echo "Available tags in https://hub.docker.com/r/zokradonh/kopano_webapp/: $(docker_tag_search zokradonh/kopano_webapp)"
 	fi
 	value_default=latest
 	read -r -p "Which tag do you want to use for Kopano WebApp? [$value_default]: " new_value
 	WEBAPP_VERSION=${new_value:-$value_default}
 
-	if command -v jq > /dev/null; then
+	if command -v reg > /dev/null; then
 		echo "Available tags in https://hub.docker.com/r/zokradonh/kopano_zpush/: $(docker_tag_search zokradonh/kopano_zpush)"
 	fi
 	value_default=latest
 	read -r -p "Which tag do you want to use for Z-Push? [$value_default]: " new_value
 	ZPUSH_VERSION=${new_value:-$value_default}
 
-	if command -v jq > /dev/null; then
+	if command -v reg > /dev/null; then
 		echo "Available tags in https://hub.docker.com/r/zokradonh/kopano_konnect/: $(docker_tag_search zokradonh/kopano_konnect)"
 	fi
 	value_default=latest
diff --git a/test.exp b/test.exp
index 8f23736..8ce5968 100755
--- a/test.exp
+++ b/test.exp
@@ -16,3 +16,13 @@ expect {
 	}
 	eof
 }
+
+spawn "./setup-update-tag.sh"
+
+expect {
+	"#?" {
+		send "\r"
+		exp_continue
+	}
+	eof
+}
diff --git a/version.sh b/version.sh
index 54bcfa5..5e9e225 100755
--- a/version.sh
+++ b/version.sh
@@ -11,8 +11,9 @@ distribution=${2:-Debian_9.0}
 
 if [ -e ./.env ]; then
 	# this is a kind of ugly hack to be able to source the env file
-	# this is sadly needed since postfix in https://github.com/tomav/docker-mailserver/ cannot deal with quotes values
+	# this is sadly needed since postfix in https://github.com/tomav/docker-mailserver/ cannot deal with quoted values
 	tmpfile=$(mktemp /tmp/kopano-docker-env.XXXXXX)
+	cp ./.env "$tmpfile"
 	sed -i '/LDAP_QUERY_FILTER/s/^/#/g' "$tmpfile"
 	sed -i '/SASLAUTHD_LDAP_FILTER/s/^/#/g' "$tmpfile"
 	# shellcheck disable=SC1090