diff --git a/tools/pip-requires b/tools/pip-requires
index 6f3f5912..c274774d 100644
--- a/tools/pip-requires
+++ b/tools/pip-requires
@@ -1,7 +1,8 @@
 eventlet>=0.15
 msgpack-python>=0.3.0  # RPC library, BGP speaker(net_cntl)
 netaddr
-oslo.config>=1.6.0, <=3.0.0
+oslo.config>=1.6.0, <=3.0.0 ; python_version < '2.7'
+oslo.config>=1.6.0 ; python_version >= '2.7'
 routes  # wsgi
 six>=1.4.0
 webob>=1.2  # wsgi