diff --git a/Dockerfile b/Dockerfile
index a243610..9e78e74 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # Deployment doesn't work on Alpine
 FROM php:7.3-cli AS deployer
-ENV OSTICKET_VERSION=1.14.3
+ENV OSTICKET_VERSION=1.15.7
 RUN set -x \
     && apt-get update \
     && apt-get install -y git-core \
@@ -21,6 +21,11 @@ ENV HOME=/data
 # setup workdir
 WORKDIR /data
 COPY --from=deployer /data/upload upload
+
+# Fix iconv bug (empty body when mail encoded in quoted-printable)
+RUN apk add --no-cache --repository http://dl-3.alpinelinux.org/alpine/edge/testing gnu-libiconv
+ENV LD_PRELOAD /usr/lib/preloadable_libiconv.so php
+
 RUN set -x && \
     # requirements and PHP extensions
     apk add --no-cache --update \
@@ -34,6 +39,7 @@ RUN set -x && \
         openldap \
         libintl \
         libxml2 \
+		libzip-dev \
         icu \
         openssl && \
     apk add --no-cache --virtual .build-deps \
@@ -48,7 +54,7 @@ RUN set -x && \
         g++ \
         make \
         pcre-dev && \
-    docker-php-ext-install gd curl ldap mysqli sockets gettext mbstring xml intl opcache && \
+    docker-php-ext-install gd curl ldap mysqli sockets gettext mbstring xml intl opcache zip && \
     docker-php-ext-configure imap --with-imap-ssl && \
     docker-php-ext-install imap && \
     pecl install apcu && docker-php-ext-enable apcu && \
@@ -56,11 +62,6 @@ RUN set -x && \
     rm -rf /var/cache/apk/* && \
     # Download languages packs
     wget -nv -O upload/include/i18n/fr.phar https://s3.amazonaws.com/downloads.osticket.com/lang/fr.phar && \
-    wget -nv -O upload/include/i18n/ar.phar https://s3.amazonaws.com/downloads.osticket.com/lang/ar.phar && \
-    wget -nv -O upload/include/i18n/pt_BR.phar https://s3.amazonaws.com/downloads.osticket.com/lang/pt_BR.phar && \
-    wget -nv -O upload/include/i18n/it.phar https://s3.amazonaws.com/downloads.osticket.com/lang/it.phar && \
-    wget -nv -O upload/include/i18n/es_ES.phar https://s3.amazonaws.com/downloads.osticket.com/lang/es_ES.phar && \
-    wget -nv -O upload/include/i18n/de.phar https://s3.amazonaws.com/downloads.osticket.com/lang/de.phar && \
     mv upload/include/i18n upload/include/i18n.dist && \
     # Download LDAP plugin
     wget -nv -O upload/include/plugins/auth-ldap.phar https://s3.amazonaws.com/downloads.osticket.com/plugin/auth-ldap.phar && \
diff --git a/README.md b/README.md
index 595faee..bb740e5 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@ docker-osticket
 
 # Introduction
 
-Docker image for running version 1.14.3 of [OSTicket](http://osticket.com/).
+Docker image for running version 1.15.7 of [OSTicket](http://osticket.com/).
 
 This image has been created from the original docker-osticket image by [Petter A. Helset](mailto:petter@helset.eu).