diff --git a/requirements.txt b/requirements.txt
index 68cec7c318c3..92a9534f7c36 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,3 +30,4 @@ six
 stevedore>=0.9
 websockify<0.4
 oslo.config>=1.1.0
+pyparsing>=1.5.7,<2.0 # order-dependent python-quantumclient req, bug 1191866