diff --git a/php-apache/Dockerfile b/php-apache/Dockerfile
index 9512ced..5fb787a 100644
--- a/php-apache/Dockerfile
+++ b/php-apache/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:7.1-apache
-MAINTAINER Thomas Bruederli <thomas@roundcube.net>
+LABEL maintainer="Thomas Bruederli <thomas@roundcube.net>"
 
 RUN apt-get -qq update \
   && apt-get install -qq \
diff --git a/php-fpm/Dockerfile b/php-fpm/Dockerfile
index f07ccff..17863a1 100644
--- a/php-fpm/Dockerfile
+++ b/php-fpm/Dockerfile
@@ -1,5 +1,5 @@
 FROM php:7.1-fpm
-MAINTAINER Thomas Bruederli <thomas@roundcube.net>
+LABEL maintainer="Thomas Bruederli <thomas@roundcube.net>"
 
 RUN apt-get -qq update \
   && apt-get install -qq \