diff --git a/lists/microsoft-office365/list.json b/lists/microsoft-office365/list.json
index 128d645..3ae723d 100644
--- a/lists/microsoft-office365/list.json
+++ b/lists/microsoft-office365/list.json
@@ -1,4 +1,5 @@
 {
+  "name": "List of known Office 365 URLs and IP address ranges",
   "description": "Office 365 URLs and IP address ranges",
   "list": [
     "2a01:111:f406:8800::/64",
@@ -1334,5 +1335,6 @@
     "216.32.180.0/23",
     "2a01:111:f400:7c00::/54",
     "2a01:111:f403::/48"
-  ]
+  ],
+  "version": "20161206"
 }
diff --git a/tools/generate-office365.py b/tools/generate-office365.py
index 61db6a8..c3849bd 100644
--- a/tools/generate-office365.py
+++ b/tools/generate-office365.py
@@ -4,6 +4,7 @@
 import requests
 import xml.etree.ElementTree as ET
 import json
+import datetime
 
 url = 'https://support.content.office.net/en-us/static/O365IPAddresses.xml'
 r = requests.get(url)
@@ -13,7 +14,11 @@ for address in office365.iter('address'):
     l.append(address.text.replace('*', ''))
 
 warninglist = {}
+warninglist['name'] = 'List of known Office 365 URLs and IP address ranges'
+d = datetime.datetime.now()
+warninglist['version'] = "{0}{1:02d}{2:02d}".format(d.year, d.month, d.day)
 warninglist['description'] = 'Office 365 URLs and IP address ranges'
 warninglist['list'] = l
 
+
 print (json.dumps(warninglist))