diff --git a/borg/Dockerfile b/borg/Dockerfile
index f6d1e57..924182a 100644
--- a/borg/Dockerfile
+++ b/borg/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:buster-20210111-slim as builder
+FROM debian:buster-20210208-slim as builder
 ARG DEBIAN_FRONTEND=noninteractive
 ARG TARGETARCH
 RUN apt update -qq && apt install wget -qqy && rm -rf /var/lib/apt/lists/*
@@ -15,5 +15,5 @@ RUN case $TARGETARCH in \
         ;; \
     esac && \
     chmod a+x /usr/bin/borg 
-FROM debian:buster-20210111-slim
+FROM debian:buster-20210208-slim
 COPY --from=builder /usr/bin/borg /usr/bin/borg
diff --git a/dendrite/Dockerfile b/dendrite/Dockerfile
index af87268..6f57592 100644
--- a/dendrite/Dockerfile
+++ b/dendrite/Dockerfile
@@ -6,7 +6,7 @@ WORKDIR /
 RUN git clone -b v${VERSION} --depth 1 https://github.com/matrix-org/dendrite.git && \
     cd dendrite && rm -rf .git && ./build.sh
 
-FROM debian:buster-20210111-slim
+FROM debian:buster-20210208-slim
 
 COPY --from=builder /dendrite/bin/ /usr/local/bin/
 COPY --from=builder /dendrite/dendrite-config.yaml /usr/local/share/
diff --git a/keycloak/Dockerfile b/keycloak/Dockerfile
index 5666de2..218ce2f 100644
--- a/keycloak/Dockerfile
+++ b/keycloak/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:buster-20210111-slim
+FROM debian:buster-20210208-slim
 ADD https://curl.haxx.se/ca/cacert.pem /etc/ssl/certs/cacert.pem
 ENV CURL_CA_BUNDLE=/etc/ssl/certs/cacert.pem
 
diff --git a/roundcubemail/Dockerfile b/roundcubemail/Dockerfile
index fe01cfb..4490ab8 100644
--- a/roundcubemail/Dockerfile
+++ b/roundcubemail/Dockerfile
@@ -1,68 +1,45 @@
-FROM php:7.4.14-apache-buster
-LABEL maintainer="Thomas Bruederli <thomas@roundcube.net>"
-
+FROM debian:buster-20210208-slim
 RUN set -ex; \
 	apt-get update; \
-	\
-	savedAptMark="$(apt-mark showmanual)"; \
-	\
 	apt-get install -y --no-install-recommends \
-		libfreetype6-dev \
-		libicu-dev \
-		libjpeg62-turbo-dev \
-		libldap2-dev \
-		libmagickwand-dev \
-		libpng-dev \
-		libpq-dev \
-		libsqlite3-dev \
-		libzip-dev \
+		php-exif \
+		php-gd \
+		php-intl \
+		php-ldap \
+		php-pdo-mysql \
+		php-pdo-pgsql \
+		php-zip \
+		php-imagick \
+		php-cli \
+		apache2 \
+		libapache2-mod-php \
+		rsync \
+		curl \
+		gnupg \
+		dirmngr \
+		locales \
+		libc-l10n \
 	; \
-	\
-	debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)"; \
-	docker-php-ext-configure gd; \
-	docker-php-ext-configure ldap; \
-	docker-php-ext-install -j$(nproc) \
-		exif \
-		gd \
-		intl \
-		ldap \
-		pdo_mysql \
-		pdo_pgsql \
-		zip \
-	; \
-	pecl install imagick; \
-	docker-php-ext-enable imagick; \
-	\
-# reset apt-mark's "manual" list so that "purge --auto-remove" will remove all build dependencies
-	apt-mark auto '.*' > /dev/null; \
-	apt-mark manual $savedAptMark; \
-	ldd "$(php -r 'echo ini_get("extension_dir");')"/*.so \
-		| awk '/=>/ { print $3 }' \
-		| sort -u \
-		| xargs -r dpkg-query -S \
-		| cut -d: -f1 \
-		| sort -u \
-		| xargs -rt apt-mark manual; \
-	\
-	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
-	rm -rf /var/lib/apt/lists/*
+	rm -rf /var/lib/apt/lists/*; \
+	a2enmod rewrite
 
-# installto.sh dependencies
+# install composer
 RUN set -ex; \
-	\
-	apt-get update; \
-	apt-get install -y --no-install-recommends \
-			rsync \
-	; \
-	rm -rf /var/lib/apt/lists/*
+	php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"; \
+	php -r "if (hash_file('sha384', 'composer-setup.php') === '756890a4488ce9024fc62c56153228907f1545c228516cbf63f885e036d37e9a59d27d63f46af1d4d07ee0f76181c7d3') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"; \
+	php composer-setup.php --install-dir=/usr/local/bin/ --version=2.0.9; \
+	php -r "unlink('composer-setup.php');" 
 
-# ... and composer.phar
-ADD https://getcomposer.org/installer /tmp/composer-installer.php
+# include the wait-for-it.sh script
+RUN curl -fL https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh > /wait-for-it.sh && chmod +x /wait-for-it.sh
 
-RUN php /tmp/composer-installer.php --install-dir=/usr/local/bin/; \
-	rm /tmp/composer-installer.php
+# use custom PHP settings
+COPY php.ini /usr/local/etc/php/conf.d/roundcube-defaults.ini
 
-RUN a2enmod rewrite
+COPY docker-entrypoint.sh /
+
+ENTRYPOINT ["/docker-entrypoint.sh"]
+CMD ["apache2-foreground"]
 
 # expose these volumes
 VOLUME /var/roundcube/config
@@ -76,9 +53,6 @@ ENV ROUNDCUBEMAIL_VERSION $VERSION
 
 # Download package and extract to web volume
 RUN set -ex; \
-	fetchDeps="gnupg dirmngr locales libc-l10n"; \
-	apt-get -qq update; \
-	apt-get install -y --no-install-recommends $fetchDeps; \
 	curl -o roundcubemail.tar.gz -fSL https://github.com/roundcube/roundcubemail/releases/download/${ROUNDCUBEMAIL_VERSION}/roundcubemail-${ROUNDCUBEMAIL_VERSION}-complete.tar.gz; \
 	curl -o roundcubemail.tar.gz.asc -fSL https://github.com/roundcube/roundcubemail/releases/download/${ROUNDCUBEMAIL_VERSION}/roundcubemail-${ROUNDCUBEMAIL_VERSION}-complete.tar.gz.asc; \
 	export GNUPGHOME="$(mktemp -d)"; \
@@ -93,14 +67,3 @@ RUN set -ex; \
 	rm -r "$GNUPGHOME" roundcubemail.tar.gz.asc roundcubemail.tar.gz; \
 	rm -rf /usr/src/roundcubemail/installer; \
 	chown -R www-data:www-data /usr/src/roundcubemail/logs
-
-# include the wait-for-it.sh script
-RUN curl -fL https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh > /wait-for-it.sh && chmod +x /wait-for-it.sh
-
-# use custom PHP settings
-COPY php.ini /usr/local/etc/php/conf.d/roundcube-defaults.ini
-
-COPY docker-entrypoint.sh /
-
-ENTRYPOINT ["/docker-entrypoint.sh"]
-CMD ["apache2-foreground"]
diff --git a/roundcubemail/version b/roundcubemail/version
index 1f57c43..2c9678a 100644
--- a/roundcubemail/version
+++ b/roundcubemail/version
@@ -1 +1 @@
-VERSION=1.4.10
+VERSION=1.4.11