diff --git a/core/admin/start.sh b/core/admin/start.sh
index 4f60e39d..8208e4a1 100755
--- a/core/admin/start.sh
+++ b/core/admin/start.sh
@@ -2,4 +2,4 @@
 
 python manage.py advertise
 python manage.py db upgrade
-gunicorn -w 4 -b 0.0.0.0:80 -b [::]:80 --access-logfile - --error-logfile - --preload mailu:app
+gunicorn -w 4 -b :80 --access-logfile - --error-logfile - --preload mailu:app
diff --git a/webmails/roundcube/Dockerfile b/webmails/roundcube/Dockerfile
index 3f7eee0d..99567502 100644
--- a/webmails/roundcube/Dockerfile
+++ b/webmails/roundcube/Dockerfile
@@ -1,11 +1,8 @@
-FROM php:7.0-apache
+FROM php:7.2-apache
 
 RUN apt-get update && apt-get install -y \
-      libfreetype6-dev \
-      libjpeg62-turbo-dev \
-      libmcrypt-dev \
-      libpng-dev \
- && docker-php-ext-install pdo_mysql mcrypt zip
+      zlib1g-dev \
+ && docker-php-ext-install zip
 
 ENV ROUNDCUBE_URL https://github.com/roundcube/roundcubemail/releases/download/1.3.7/roundcubemail-1.3.7-complete.tar.gz