diff --git a/setup.py b/setup.py
index ecf4198d..e4b7eded 100644
--- a/setup.py
+++ b/setup.py
@@ -64,6 +64,7 @@ setup(
     tests_require=tests_require,
 
     extras_require={
-        'develop': tests_require + ["sphinx", "sphinx_rtd_theme"]
+        'develop': tests_require + ["sphinx", "sphinx_rtd_theme"],
+        'requests': ['requests>=2.0.0, <3.0.0']
     },
 )