diff --git a/Dockerfile b/Dockerfile
index 97e43f2..af6052b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,7 +10,7 @@ ENV  S3_BUCKET="https://my-bucket.s3.amazonaws.com"
 ENV  FTP_ADDR="0.0.0.0:21"
 EXPOSE 21
 ENV  FTP_PASSIVE_PORT_RANGE="50000-50100"
-EXPOSE 50000-50100
+EXPOSE 30000-30100
 ENV  FTP_FEATURES="ls"
 
 VOLUME ["/etc/f3"]