diff --git a/Dockerfile b/Dockerfile
index 215070a..1b1ed86 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM alpine:edge
 
 RUN  \
     echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories && \
-    apk -U add proftpd proftpd-mod_tls proftpd-utils openssl perl && \
+    apk -U add proftpd proftpd-mod_tls proftpd-mod_ifsession proftpd-utils openssl perl && \
     mkdir -p /var/run/proftpd /etc/proftpd/custom.conf.d/
 
 COPY custom.conf /etc/proftpd/conf.d/custom.conf