diff --git a/Dockerfile b/Dockerfile
index 225e964..fc0f171 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,7 +10,7 @@ COPY syslog-ng.conf /etc/syslog-ng
 RUN mkdir -p /var/log/remote
 
 VOLUME /var/log/remote
-EXPOSE 514/UDP
+EXPOSE 514/udp
 
 CMD [ "/usr/sbin/syslog-ng", "-f", "/etc/syslog-ng/syslog-ng.conf", "-F" ]