diff --git a/CHANGES.rst b/CHANGES.rst
index 468a1d9..5c01c0d 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+99.1 (unreleased)
+-----------------
+
+- Nothing changed yet.
+
+
 99.0 (2017-06-01)
 -----------------
 
diff --git a/setup.py b/setup.py
index f536c1b..07dbdd2 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 
 setup(
     name='five.globalrequest',
-    version='99.0',
+    version='99.1.dev0',
     description="DEPRECATED: Zope integration for zope.globalrequest",
     long_description=(open("README.rst").read() + "\n" +
                       open("CHANGES.rst").read()),