diff --git a/docker/coturn/Dockerfile b/docker/coturn/Dockerfile
index 63e06f40..209e4992 100644
--- a/docker/coturn/Dockerfile
+++ b/docker/coturn/Dockerfile
@@ -1,12 +1,22 @@
 FROM fedora:34
 
 MAINTAINER Jeroen van Meeuwen <vanmeeuwen@kolabsys.com>
 
 RUN dnf -y install \
         --setopt 'tsflags=nodocs' \
         coturn && \
     dnf clean all
 
 COPY rootfs/ /
 
+RUN chgrp -R 0 /tmp && \
+    chmod -R g=u /tmp
+
+RUN chmod -R 777 /tmp /var/lib/coturn
+RUN chown -R 1001:0 /tmp /var/lib/coturn
+
+USER 1001
+
+EXPOSE 3478 5349
+
 CMD ["/usr/local/bin/coturn.sh"]