Add models for VPN service
diff --git a/xos/configurations/common/Dockerfile.common b/xos/configurations/common/Dockerfile.common
index 03b479a..3f6a721 100644
--- a/xos/configurations/common/Dockerfile.common
+++ b/xos/configurations/common/Dockerfile.common
@@ -28,7 +28,8 @@
     python-dev \
     libyaml-dev \
     pkg-config \
-    python-pycurl
+    python-pycurl \
+    openvpn
 
 RUN pip install django==1.7
 RUN pip install djangorestframework==2.4.4