diff --git a/Dockerfile b/Dockerfile
index 5b833f3..3b53121 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,3 +34,5 @@ RUN apk add --no-cache --purge --clean-protected --update libc6-compat libstdc++
 EXPOSE 9993/udp
 
 ENTRYPOINT ["zerotier-one"]
+
+CMD ["-U"]