diff --git a/docker/Dockerfile b/docker/Dockerfile
index d0dfa31..9a8c2fd 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -33,8 +33,9 @@ RUN sed -i -e 's#^;sendmail_path =#sendmail_path = "/usr/bin/msmtp -t"#' /usr/lo
 COPY wait-for-it /usr/local/bin/
 
 # Add composer
-RUN curl -4 https://getcomposer.org/installer|php -- --install-dir=/usr/local/bin --filename=composer
 ENV COMPOSER_HOME=/var/cache/composer
+RUN curl -4 https://getcomposer.org/installer|php -- --install-dir=/usr/local/bin --filename=composer \
+	&& chown ${SITE_USER}:0 ${COMPOSER_HOME}
 
 # Other config
 COPY msmtprc /etc/