Pin urllib3 requirement (#171)

Eric Fischer · web-flow · commit b48321a32c7d · 2017-06-07T16:12:42.000-04:00
diff --git a/requirements/base.txt b/requirements/base.txt
@@ -8,6 +8,7 @@ django-storages==1.5.2              # BSD
 elasticsearch-dsl==0.0.11           # Apache 2.0
 ordered-set==2.0.2                  # MIT
 tqdm==4.11.2                        # MIT
+urllib3==1.21.1                     # MIT
 
 # markdown is used by swagger for rendering the api docs
 Markdown==2.6.6    					# BSD
