diff -up requests-2.14.2/setup.py.orig requests-2.14.2/setup.py
--- requests-2.14.2/setup.py.orig	2019-11-04 17:11:05.771696023 -0700
+++ requests-2.14.2/setup.py	2019-11-04 17:22:36.709429678 -0700
@@ -48,7 +48,7 @@ packages = [
     'requests.packages.urllib3.contrib._securetransport',
 ]
 
-requires = []
+requires = ['urllib3>=1.21.1']
 test_requirements = ['pytest>=2.8.0', 'pytest-httpbin==0.0.7', 'pytest-cov', 'pytest-mock']
 
 with open('requests/__init__.py', 'r') as fd: