diff --git a/samba-ad-dc/Dockerfile b/samba-ad-dc/Dockerfile
index 3e00260..571aba2 100644
--- a/samba-ad-dc/Dockerfile
+++ b/samba-ad-dc/Dockerfile
@@ -3,7 +3,7 @@ FROM phusion/baseimage:0.9.17
 ENV DEBIAN_FRONTEND noninteractive
 
 RUN apt-get update && apt-get install -y \
-        samba \
+        samba winbind \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*