diff --git a/TODO b/TODO
index abe3420..18ac285 100644
--- a/TODO
+++ b/TODO
@@ -1,44 +1,54 @@
 Python3 migration
 -----------------
 
-Existing software must work with Python version 3.8 or newer.
+2021-01-02
+
+Existing software must work with Python version 3.8 or newer.  The target
+operating system is Debian Linux Sid (the current unstable version).
 
 No new functionality is required.
 
-Currently, eventlib works with Python version 2.7, it is bug free for +5
-years. Projects available in the open domain that use python-eventlib:
+Currently, eventlib works with Python version 2 and it is bug free for +5
+years.  The current stable environment where the software has been tested is
+Debian Buster 10 using Python version 2.7
+
+Projects available in the open domain that use python-eventlib on Debian Buster:
 
  * python-xcaplib 
  * python-msrplib 
  * python-sipsimple 
  * blink-qt 
  * sylkserver
 
 
 Deliverables
 ------------
 
 The following modules must be proven to work with Python 3.8.  If no test is
 available in greentest/ and examples/ folders, a new test script must be
 created.
 
 from eventlib import api, coros, proc
 from eventlib.api import timeout, sleep
 from eventlib.coros import event, queue
 from eventlib.green.httplib import BadStatusLine
 from eventlib.green import socket, select, ssl, httplib, urllib2
 from eventlib.green.socket import gethostbyname
 from eventlib.green.threading import RLock
 from eventlib.greenio import GreenSocket
 from eventlib.proc import spawn, ProcExit
 from eventlib.support import greenlets as greenlet
 from eventlib.twistedutil import callInGreenThread, deferToGreenThread, block_on, join_reactor
 from eventlib.twistedutil.protocol import GreenTransportBase, ValueQueue, GreenClientCreator, SpawnFactory
 from eventlib.util import tcp_socket, set_reuse_addr
 
+The target operating system is Debian Linux Sid (the current unstable version).
+
 
 Patches
 -------
 
 Fork the project on github and provide the link for the modified branch(es).
 
+Or send a patch by email to support@ag-projects.com
+