diff --git a/roundcubemail/Dockerfile b/roundcubemail/Dockerfile
index 03e6a96..3a1a09c 100644
--- a/roundcubemail/Dockerfile
+++ b/roundcubemail/Dockerfile
@@ -10,9 +10,11 @@ RUN set -ex; \
 		php-ldap \
 		php-pdo-mysql \
 		php-pdo-pgsql \
+		php-pdo-sqlite \
 		php-zip \
 		php-imagick \
 		php-cli \
+		php-mbstring \
 		apache2 \
 		libapache2-mod-php \
 		rsync \