diff --git a/tools/pip-requires b/tools/pip-requires
index e012257cdc..1aa8fed1d8 100644
--- a/tools/pip-requires
+++ b/tools/pip-requires
@@ -4,7 +4,7 @@ cmd2
 httplib2
 keyring
 prettytable
-pyparsing
+pyparsing>=1.5.6,<2.0
 pycrypto
 python-keystoneclient>=0.2,<1.0
 python-novaclient>=2