diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -168,6 +168,7 @@ def _filter_requirements(lines_iter, filter_names=None,
 REQ_UPPER_BOUNDS = {
     'bcolz': '<1',
     'pandas': '<0.19',
+    'networkx': '<2.0',
 }
MAINT: networkx 2 changes the behavior of out_degree