diff --git a/install_postfixadmin.sh b/install_postfixadmin.sh
index 36a8ca7..8c693d6 100755
--- a/install_postfixadmin.sh
+++ b/install_postfixadmin.sh
@@ -187,10 +187,9 @@ detect_mysql_version () {
 # -
 systemd_supported=false
 
-systemd=$(which systemd)
 systemctl=$(which systemctl)
 
-if [[ -n "$systemd" ]] && [[ -n "$systemctl" ]] ; then
+if [[ -n "$systemctl" ]] ; then
    systemd_supported=true
 fi
 
@@ -256,6 +255,14 @@ do
       echo -e "\n\t\033[33m\033[1mA version number is required!\033[m\n"
    fi
 done
+
+IFS='.' read -r PF_ADMIN_MAJOR_VERSION PF_ADMIN_MINOR_VERSION  PF_ADMIN_PATCH_LEVEL <<< "$PF_ADMIN_VERSION"
+#echo ""
+#echo "PF_ADMIN_MAJOR_VERSION: $PF_ADMIN_MAJOR_VERSION"
+#echo "PF_ADMIN_MINOR_VERSION: $PF_ADMIN_MINOR_VERSION"
+#echo "PF_ADMIN_PATCH_LEVEL:   $PF_ADMIN_PATCH_LEVEL"
+#exit
+
 echo ""
 echo -e "\033[32m--\033[m"
 echo ""
@@ -275,6 +282,9 @@ DEFAULT_APACHE_SERVER_CERT="server-bundle.crt"
 DEFAULT_APACHE_SERVER_KEY="server.key"
 DEFAULT_DEBIAN_APACHE_VHOST_DIR="/etc/apache2/sites-available"
 DEFAULT_APACHE_VHOST_DIR="/usr/local/apache2/conf/vhosts"
+
+DEFAULT_COMPOSER="/usr/local/bin/composer"
+
 DEFAULT_POSTFIX_DB_HOST_PGSQL="/run/postgresql"
 if [[ -S "/tmp/mysql.sock" ]] ; then
    DEFAULT_POSTFIX_DB_HOST_MYSQL="unix:/tmp/mysql.sock"
@@ -379,6 +389,8 @@ if [[ -z "$APACHE_VHOST_DIR" ]] ; then
    fi
 fi
 
+[[ -n "${COMPOSER}" ]] || COMPOSER=${DEFAULT_COMPOSER} 
+
 [[ -n "$POSTFIX_DB_TYPE" ]] || fatal "Database Type of Postfix Database (POSTFIX_DB_TYPE) not present!"
 [[ -n "$POSTFIX_DB_HOST_MYSQL" ]] || POSTFIX_DB_HOST_MYSQL="$DEFAULT_POSTFIX_DB_HOST_MYSQL"
 [[ -n "$POSTFIX_DB_HOST_PGSQL" ]] ||POSTFIX_DB_HOST_PGSQL="$DEFAULT_POSTFIX_DB_HOST_PGSQL"
@@ -931,6 +943,64 @@ else
 fi
 
 
+echo -e "\n\n\t\033[37m\033[1mInstall (global) composer..\033[m\n"
+
+echononl "\tDownload composer from 'getcomposer.org'.."
+php -r "copy('https://getcomposer.org/installer', '${_src_base_dir}/composer-setup.php');" > $log_file 2>&1
+if [[ "$?" = "0" ]]; then
+   echo_ok
+else
+   echo_failed
+   error "$(cat $log_file)"
+
+   echononl "\tcontinue anyway [yes/no]: "
+   read OK
+   OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
+   while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
+      echononl "Wrong entry! - repeat [yes/nno]: "
+      read OK
+   done
+   [[ $OK = "yes" ]] || fatal "Script terminated by user input.."
+fi
+
+echononl "\tInstall composer to ${COMPOSER}"
+php ${_src_base_dir}/composer-setup.php --install-dir=$(dirname ${COMPOSER}) \
+   --filename=$(basename ${COMPOSER}) > $log_file 2>&1
+if [[ "$?" = "0" ]]; then
+   echo_ok
+else
+   echo_failed
+   error "$(cat $log_file)"
+
+   echononl "\tcontinue anyway [yes/no]: "
+   read OK
+   OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
+   while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
+      echononl "Wrong entry! - repeat [yes/nno]: "
+      read OK
+   done
+   [[ $OK = "yes" ]] || fatal "Script terminated by user input.."
+fi
+
+echononl "\tRemove the installer"
+php -r "unlink('${_src_base_dir}/composer-setup.php');" > $log_file 2>&1
+if [[ "$?" = "0" ]]; then
+   echo_ok
+else
+   echo_failed
+   error "$(cat $log_file)"
+
+   echononl "\tcontinue anyway [yes/no]: "
+   read OK
+   OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
+   while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
+      echononl "Wrong entry! - repeat [yes/nno]: "
+      read OK
+   done
+   [[ $OK = "yes" ]] || fatal "Script terminated by user input.."
+fi
+
+
    
 echo -e "\n\n\t\033[37m\033[1mBase install Postfixadmin..\033[m\n"
 
@@ -1102,6 +1172,37 @@ else
    echo_ok
 fi
 
+echononl "\tInstall PHP dependencies ( composer install --no-dev ... ).."
+if [[ ${PF_ADMIN_MAJOR_VERSION} -gt 3 ]] ; then
+   if $PHP_DEBIAN_INSTALLATION ; then
+      su ${HTTP_USER} -c"cd ${WEBSITE_BASEDIR}/postfixadmin-${PF_ADMIN_VERSION}
+         php /usr/local/bin/composer install --prefer-dist --no-interaction --no-dev" -s /bin/bash \
+         > $log_file 2>&1
+   else
+      su ${HTTP_USER} -c"cd ${WEBSITE_BASEDIR}/postfixadmin-${PF_ADMIN_VERSION}
+         /usr/local/php-${php_latest_ver}/bin/php /usr/local/bin/composer --prefer-dist \
+            --no-interaction install --no-dev" -s /bin/bash > $log_file 2>&1
+   fi
+   if [[ $? -eq 0 ]]; then
+         echo_ok
+   else
+      echo_failed
+      error "$(cat $log_file)"
+
+      echononl "\tcontinue anyway [yes/no]: "
+      read OK
+      OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
+      while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
+         echononl "Wrong entry! - repeat [yes/nno]: "
+         read OK
+      done
+      [[ $OK = "yes" ]] || fatal "Script terminated by user input.."
+   fi
+else
+   echo_skipped
+fi
+
+
 
 echononl "\tRemove existing symlink '${WEBSITE_BASEDIR}/htdocs'"
 if [[ -h "${WEBSITE_BASEDIR}/htdocs" ]]; then
@@ -3496,6 +3597,26 @@ else
    error "$(cat $log_file)"
 fi
 
+
+
+echononl "\tRestart Apache Webservice.."
+if [[ -n "$APACHE_SERVICE_FILE" ]] ||  [[ -n "$APACHE_INIT_SCRIPT" ]] ; then
+	if [[ -n "$APACHE_SERVICE_FILE" ]] ; then
+		systemctl restart $APACHE_SERVICE_FILE > $log_file 2>&1
+	else
+		$APACHE_INIT_SCRIPT restart > $log_file 2>&1
+	fi
+	if [[ $? -eq 0 ]]; then
+		echo_ok
+	else
+		echo_failed
+		error "$(cat $log_file)"
+	fi
+else
+	echo_skipped
+	warn "Neither an init-script nor a service file for 'apache2' webservice  found!"
+fi
+
 # - Start all PHP FPM engines
 # -
 if [[  -n "$php_major_versions" ]]; then
@@ -3543,7 +3664,7 @@ fi
 
 
 echo ""
-info "Browse to \033[1mhttp://${WEBSITE_NAME}/setup.php\033[m to create a 'setup password'\n$(cat <<EOF
+info "Browse to \033[1mhttps://${WEBSITE_NAME}/setup.php\033[m to create a 'setup password'\n$(cat <<EOF
 
 \t          \033[33mIn caes of updating postfix.admin browse this URL and \033[1mlogin with your
 \t          setup_password\033[m\033[33m, because only after that the database '${POSTFIX_DB_NAME}'