diff --git a/requirements.txt b/requirements.txt
index 18254bdd85..3f1a702530 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,4 +13,5 @@ PrettyTable<0.8,>=0.7.1 # BSD
 pycrypto>=2.6 # Public Domain
 python-memcached>=1.56 # PSF
 PyYAML>=3.10.0 # MIT
+urllib3>=1.15.1  # MIT
 virtualenv>=13.1.0 # MIT