From 528d956f4a03ba8d43185a151b86124fff50ce96 Mon Sep 17 00:00:00 2001
From: Chris Lenk <clenk@mitre.org>
Date: Thu, 18 Feb 2021 20:45:38 -0500
Subject: [PATCH] Specify lowest supported Python version

---
 README.rst | 2 ++
 setup.py   | 1 +
 2 files changed, 3 insertions(+)

diff --git a/README.rst b/README.rst
index 6055cf9..662e020 100644
--- a/README.rst
+++ b/README.rst
@@ -21,6 +21,8 @@ Install with `pip <https://pip.pypa.io/en/stable/>`__:
 
   $ pip install stix2
 
+Note: The library requires Python 3.6+.
+
 Usage
 -----
 
diff --git a/setup.py b/setup.py
index 175c32d..3f82733 100644
--- a/setup.py
+++ b/setup.py
@@ -47,6 +47,7 @@ setup(
     ],
     keywords='stix stix2 json cti cyber threat intelligence',
     packages=find_packages(exclude=['*.test', '*.test.*']),
+    python_requires='>=3.6',
     install_requires=[
         'pytz',
         'requests',