diff --git a/Dockerfile b/Dockerfile
index 87fb1fa..6883e80 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM registry.jochum.dev/roundcube/roundcubemail:1.4.8-apache
+FROM roundcube/roundcubemail:1.4.11-apache
 
 LABEL maintainer="René Jochum <rene@jochum.dev>"
 
diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index 4893140..922f1c3 100755
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -3,6 +3,15 @@
 
 # PWD=`pwd`
 
+if [ -z "${APT_CACHER}" ]; then
+    APT_CACHER="apt-cacher.apt-cacher.svc.cluster.local"
+fi
+
+nc -w1 -z ${APT_CACHER} 3142 1>/dev/null 2>&1 && \
+    echo 'Acquire::HTTP::Proxy "http://'${APT_CACHER}':3142";' >> /etc/apt/apt.conf.d/01proxy && \
+    echo 'Acquire::HTTPS::Proxy "false";' >> /etc/apt/apt.conf.d/01proxy
+
+
 if [[ "$1" == apache2* ]] || [ "$1" == php-fpm ]; then
   if ! [ -e index.php -a -e bin/installto.sh ]; then
     echo >&2 "roundcubemail not found in $PWD - copying now..."
@@ -72,6 +81,16 @@ if [[ "$1" == apache2* ]] || [ "$1" == php-fpm ]; then
 
     echo "Write config to $PWD/config/config.inc.php"
     echo "<?php
+    \$config['imap_conn_options'] = array(
+        'ssl' => array('verify_peer' => false, 'verify_peer_name' => false),
+        'tls' => array('verify_peer' => false, 'verify_peer_name' => false),
+    );
+
+    \$config['smtp_conn_options'] = array(
+            'ssl' => array('verify_peer' => false, 'verify_peer_name' => false),
+            'tls' => array('verify_peer' => false, 'verify_peer_name' => false),
+    );
+
     \$config['db_dsnw'] = '${ROUNDCUBEMAIL_DSNW}';
     \$config['db_dsnr'] = '${ROUNDCUBEMAIL_DSNR}';
     \$config['default_host'] = '${ROUNDCUBEMAIL_DEFAULT_HOST}';