diff --git a/CHANGES.txt b/CHANGES.txt
index 19c9eb32..e92afc10 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,6 +1,12 @@
 Change History
 ==============
 
+1.8.5 (unreleased)
+------------------
+
+- Nothing changed yet.
+
+
 1.8.4 (2017-07-08)
 ------------------
 
diff --git a/setup.py b/setup.py
index 25ac09a1..f750de3e 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,6 @@
 from setuptools import setup, find_packages
 
-version = '1.8.4'
+version = '1.8.5.dev0'
 
 setup(name='Products.PloneFormGen',
       version=version,