diff --git a/requirements.txt b/requirements.txt
index e43dcdd080..d414cb3f81 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,10 +4,12 @@
 pip>=6.0 # MIT
 setuptools!=24.0.0,>=16.0 # PSF/ZPL
 wheel # MIT
+pyasn1  # BSD
+pyOpenSSL>=0.14  # Apache-2.0
+requests>=2.10.0  # Apache-2.0
+ndg-httpsclient>=0.4.2;python_version<'3.0'  # BSD
 netaddr!=0.7.16,>=0.7.12 # BSD
 PrettyTable<0.8,>=0.7 # BSD
-pyasn1 # BSD
-pyOpenSSL>=0.14 # Apache-2.0
 pycrypto>=2.6 # Public Domain
 PyYAML>=3.1.0 # MIT
 virtualenv # MIT