diff --git a/Dockerfile b/Dockerfile
index e7ee383..774f28c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,6 +9,7 @@ RUN curl -sSLf -o /usr/local/bin/install-php-extensions https://github.com/mloca
     install-php-extensions @composer ctype dom fileinfo gd iconv intl libxml mbstring simplexml xml xmlwriter zip zlib bz2 phar yaml &&\
     ln -s /usr/local/bin/php /usr/bin/php
 COPY dockerinit.sh /opt/dockerinit.sh
+ENV COMPOSER_ALLOW_SUPERUSER=1
 RUN freshclam --foreground
 RUN cd /opt &&\
     composer require -o --update-no-dev acdh-oeaw/repo-file-checker &&\