Bump for development
diff --git a/docs/changes.rst b/docs/changes.rst
index a6c7163..02067ae 100644
--- a/docs/changes.rst
+++ b/docs/changes.rst
@@ -1,6 +1,10 @@
Release History
===============
+16.1.0 (unreleased)
+-------------------
+
+
16.0.0 (2018-05-16)
-------------------
diff --git a/virtualenv.py b/virtualenv.py
index cbf41de..c008a39 100755
--- a/virtualenv.py
+++ b/virtualenv.py
@@ -37,7 +37,7 @@
except ImportError:
import configparser as ConfigParser
-__version__ = "16.0.0"
+__version__ = "16.1.0.dev0"
virtualenv_version = __version__ # legacy
if sys.version_info < (2, 7):
