fwiw, I do not get a deprecation warning w/ this diff applied:

diff --git a/3rdparty/python/requirements.txt b/3rdparty/python/requirements.txt
index 3371aaf..4af4dfa 100644
--- a/3rdparty/python/requirements.txt
+++ b/3rdparty/python/requirements.txt
@@ -16,11 +16,12 @@ pex==1.2.11
 psutil==4.3.0
 pyflakes==1.1.0
 Pygments==1.4
+pyopenssl==17.1.0
 pystache==0.5.3
 pytest-cov>=2.4,<2.5
 pytest>=3.0.7,<4.0
 pywatchman==1.3.0
-requests==2.5.0,<2.19
+requests[security]==2.5.0,<2.19
 scandir==1.2
 setproctitle==1.1.10
 setuptools==30.0.0