diff --git a/setup.py b/setup.py
index 55ef63985..aa4247763 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@
 f.close()
 
 install_requires = [
-    'urllib3<1.22,>=1.21.1',
+    'urllib3<1.23,>=1.21.1',
 ]
 tests_require = [
     'requests>=2.0.0, <3.0.0',