diff --git a/Dockerfile b/Dockerfile
index 3350ed5..23e820d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,14 +1,11 @@
 FROM ubuntu
 
-RUN apt-get update -y
-RUN apt-get install -y proftpd
+RUN apt-get update && apt-get install -y apt-transport-https && apt-get install -y proftpd && apt-get install sudo
 
 ADD launch /launch
 ADD proftpd.conf /etc/proftpd/proftpd.conf
-RUN sudo chown root:root /etc/proftpd/proftpd.conf
-RUN mkdir /ftp
+RUN sudo chown root:root /etc/proftpd/proftpd.conf && mkdir /ftp
 
-EXPOSE 21
-EXPOSE 20
+EXPOSE 21 20 37185-37190
 
 ENTRYPOINT /launch
diff --git a/proftpd.conf b/proftpd.conf
index 56eaf5a..98642a5 100644
--- a/proftpd.conf
+++ b/proftpd.conf
@@ -1,7 +1,9 @@
 ServerName "proftpd"
 DefaultRoot /ftp
 User root
-
+<Global>
+PassivePorts 37185 37190
+</Global>
 <Anonymous ~ftp>
 RequireValidShell off
 MaxClients 10