diff --git a/5.4/Dockerfile b/5.4/Dockerfile
index ce9814c..0adda27 100644
--- a/5.4/Dockerfile
+++ b/5.4/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:5.4
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -36,4 +36,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/5.4/apache/Dockerfile b/5.4/apache/Dockerfile
index 2f7e218..f5ea470 100644
--- a/5.4/apache/Dockerfile
+++ b/5.4/apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:5.4-apache
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -37,4 +37,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/5.4/fpm/Dockerfile b/5.4/fpm/Dockerfile
index d68fab3..06da862 100644
--- a/5.4/fpm/Dockerfile
+++ b/5.4/fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:5.4-fpm
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -36,4 +36,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/5.5/Dockerfile b/5.5/Dockerfile
index 096e206..201c933 100644
--- a/5.5/Dockerfile
+++ b/5.5/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:5.5
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -36,4 +36,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/5.5/apache/Dockerfile b/5.5/apache/Dockerfile
index c3f2f94..c913039 100644
--- a/5.5/apache/Dockerfile
+++ b/5.5/apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:5.5-apache
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -37,4 +37,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/5.5/fpm/Dockerfile b/5.5/fpm/Dockerfile
index 0db10d8..6f8bff2 100644
--- a/5.5/fpm/Dockerfile
+++ b/5.5/fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:5.5-fpm
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -36,4 +36,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/5.6/Dockerfile b/5.6/Dockerfile
index 62223ef..f373973 100644
--- a/5.6/Dockerfile
+++ b/5.6/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:5.6
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -36,4 +36,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/5.6/apache/Dockerfile b/5.6/apache/Dockerfile
index 1abeb9f..e70ec82 100644
--- a/5.6/apache/Dockerfile
+++ b/5.6/apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:5.6-apache
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -37,4 +37,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/5.6/fpm/Dockerfile b/5.6/fpm/Dockerfile
index 8cafe6e..87f2f06 100644
--- a/5.6/fpm/Dockerfile
+++ b/5.6/fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:5.6-fpm
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -36,4 +36,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/7.0/Dockerfile b/7.0/Dockerfile
index 6a1be5d..40d4397 100644
--- a/7.0/Dockerfile
+++ b/7.0/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:7.0
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -36,4 +36,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/7.0/apache/Dockerfile b/7.0/apache/Dockerfile
index 8089ade..8825ecf 100644
--- a/7.0/apache/Dockerfile
+++ b/7.0/apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:7.0-apache
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -37,4 +37,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/7.0/fpm/Dockerfile b/7.0/fpm/Dockerfile
index 8f843f0..123e7f9 100644
--- a/7.0/fpm/Dockerfile
+++ b/7.0/fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:7.0-fpm
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -36,4 +36,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/7.1/Dockerfile b/7.1/Dockerfile
index e95a812..615f85b 100644
--- a/7.1/Dockerfile
+++ b/7.1/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:7.1
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -36,4 +36,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/7.1/apache/Dockerfile b/7.1/apache/Dockerfile
index fbd315f..30a9738 100644
--- a/7.1/apache/Dockerfile
+++ b/7.1/apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:7.1-apache
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -37,4 +37,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/7.1/fpm/Dockerfile b/7.1/fpm/Dockerfile
index af1baec..264f610 100644
--- a/7.1/fpm/Dockerfile
+++ b/7.1/fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:7.1-fpm
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -36,4 +36,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/7.2/Dockerfile b/7.2/Dockerfile
index b7fdf6e..9c73e5b 100644
--- a/7.2/Dockerfile
+++ b/7.2/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:7.2
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -35,4 +35,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/7.2/apache/Dockerfile b/7.2/apache/Dockerfile
index e7afd9f..0f6c490 100644
--- a/7.2/apache/Dockerfile
+++ b/7.2/apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:7.2-apache
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -36,4 +36,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/7.2/fpm/Dockerfile b/7.2/fpm/Dockerfile
index 222b8ed..156c5cc 100644
--- a/7.2/fpm/Dockerfile
+++ b/7.2/fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:7.2-fpm
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -35,4 +35,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/Dockerfile b/Dockerfile
index ed97ca0..3834512 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:latest
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install PHP extensions and PECL modules.
 RUN buildDeps=" \
@@ -35,4 +35,4 @@ RUN buildDeps=" \
 # Install Composer.
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
     && ln -s $(composer config --global home) /root/composer
-ENV PATH $PATH:/root/composer/vendor/bin
+ENV PATH=$PATH:/root/composer/vendor/bin COMPOSER_ALLOW_SUPERUSER=1
diff --git a/dev/5.4/Dockerfile b/dev/5.4/Dockerfile
index 07c995a..f977a28 100644
--- a/dev/5.4/Dockerfile
+++ b/dev/5.4/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:5.4
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug-2.4.1 \
diff --git a/dev/5.4/apache/Dockerfile b/dev/5.4/apache/Dockerfile
index 6988fef..8d34562 100644
--- a/dev/5.4/apache/Dockerfile
+++ b/dev/5.4/apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:5.4-apache
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug-2.4.1 \
diff --git a/dev/5.4/fpm/Dockerfile b/dev/5.4/fpm/Dockerfile
index dbfa8e0..e8b34a4 100644
--- a/dev/5.4/fpm/Dockerfile
+++ b/dev/5.4/fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:5.4-fpm
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug-2.4.1 \
diff --git a/dev/5.5/Dockerfile b/dev/5.5/Dockerfile
index 8ff2a9d..62624cd 100644
--- a/dev/5.5/Dockerfile
+++ b/dev/5.5/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:5.5
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug-2.5.5 \
diff --git a/dev/5.5/apache/Dockerfile b/dev/5.5/apache/Dockerfile
index 249e808..cd95c56 100644
--- a/dev/5.5/apache/Dockerfile
+++ b/dev/5.5/apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:5.5-apache
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug-2.5.5 \
diff --git a/dev/5.5/fpm/Dockerfile b/dev/5.5/fpm/Dockerfile
index 11c9993..416ef45 100644
--- a/dev/5.5/fpm/Dockerfile
+++ b/dev/5.5/fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:5.5-fpm
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug-2.5.5 \
diff --git a/dev/5.6/Dockerfile b/dev/5.6/Dockerfile
index 8167f35..14d0dac 100644
--- a/dev/5.6/Dockerfile
+++ b/dev/5.6/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:5.6
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug-2.5.5 \
diff --git a/dev/5.6/apache/Dockerfile b/dev/5.6/apache/Dockerfile
index e408e3a..cac5e0d 100644
--- a/dev/5.6/apache/Dockerfile
+++ b/dev/5.6/apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:5.6-apache
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug-2.5.5 \
diff --git a/dev/5.6/fpm/Dockerfile b/dev/5.6/fpm/Dockerfile
index a45643c..b36f3a1 100644
--- a/dev/5.6/fpm/Dockerfile
+++ b/dev/5.6/fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:5.6-fpm
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug-2.5.5 \
diff --git a/dev/7.0/Dockerfile b/dev/7.0/Dockerfile
index 7b60f5a..425c3db 100644
--- a/dev/7.0/Dockerfile
+++ b/dev/7.0/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:7.0
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug \
diff --git a/dev/7.0/apache/Dockerfile b/dev/7.0/apache/Dockerfile
index de0519a..84823d0 100644
--- a/dev/7.0/apache/Dockerfile
+++ b/dev/7.0/apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:7.0-apache
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug \
diff --git a/dev/7.0/fpm/Dockerfile b/dev/7.0/fpm/Dockerfile
index 953c522..7f5c5fd 100644
--- a/dev/7.0/fpm/Dockerfile
+++ b/dev/7.0/fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:7.0-fpm
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug \
diff --git a/dev/7.1/Dockerfile b/dev/7.1/Dockerfile
index 2401477..4112c13 100644
--- a/dev/7.1/Dockerfile
+++ b/dev/7.1/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:7.1
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug \
diff --git a/dev/7.1/apache/Dockerfile b/dev/7.1/apache/Dockerfile
index 6d084ea..34d9217 100644
--- a/dev/7.1/apache/Dockerfile
+++ b/dev/7.1/apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:7.1-apache
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug \
diff --git a/dev/7.1/fpm/Dockerfile b/dev/7.1/fpm/Dockerfile
index 7696195..ff231fd 100644
--- a/dev/7.1/fpm/Dockerfile
+++ b/dev/7.1/fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:7.1-fpm
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug \
diff --git a/dev/7.2/Dockerfile b/dev/7.2/Dockerfile
index 3427aa2..b390df0 100644
--- a/dev/7.2/Dockerfile
+++ b/dev/7.2/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:7.2
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug \
diff --git a/dev/7.2/apache/Dockerfile b/dev/7.2/apache/Dockerfile
index 9411496..aa03426 100644
--- a/dev/7.2/apache/Dockerfile
+++ b/dev/7.2/apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:7.2-apache
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug \
diff --git a/dev/7.2/fpm/Dockerfile b/dev/7.2/fpm/Dockerfile
index a5ebdaf..192594e 100644
--- a/dev/7.2/fpm/Dockerfile
+++ b/dev/7.2/fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:7.2-fpm
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug \
diff --git a/dev/Dockerfile b/dev/Dockerfile
index d857037..c05506b 100644
--- a/dev/Dockerfile
+++ b/dev/Dockerfile
@@ -1,5 +1,5 @@
 FROM chialab/php:latest
-MAINTAINER dev@chialab.it
+LABEL maintainer="dev@chialab.io"
 
 # Install XDebug.
 RUN pecl install xdebug \