diff --git a/lam-packaging/debian/control b/lam-packaging/debian/control
index 9edbd9cb9..7086fd0f9 100644
--- a/lam-packaging/debian/control
+++ b/lam-packaging/debian/control
@@ -12,7 +12,7 @@ Architecture: all
 Depends: php (>= 7), php-ldap,
  php-gd | php-imagick,
  php-json, php-curl,
- php-zip, php-xml, php-gmp,
+ php-zip, php-xml, php-gmp, php-mbstring,
  libapache2-mod-php | libapache2-mod-fcgid | php-fpm,
  php-monolog,
  apache2 (>= 2.4.0) | httpd, fonts-dejavu, debconf (>= 0.2.26) | debconf-2.0, ${misc:Depends}
diff --git a/lam-packaging/docker/Dockerfile b/lam-packaging/docker/Dockerfile
index 9985f3f34..7f9190d9f 100644
--- a/lam-packaging/docker/Dockerfile
+++ b/lam-packaging/docker/Dockerfile
@@ -81,6 +81,7 @@ RUN apt-get install --no-install-recommends -y \
         php-gmp \
         php-mysql \
         php-sqlite3 \
+        php-mbstring \
         wget \
     && \
     rm /etc/apache2/sites-enabled/*default* && \