diff --git a/CHANGELOG b/CHANGELOG
index b280472..0efd530 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -5,6 +5,12 @@ This document describes changes between past releases. For information about
 future releases, check `milestones`_ and :doc:`/about/vision`.
 
 
+1.10 (unreleased)
+-----------------
+
+- Nothing changed yet.
+
+
 1.9 (2016-03-15)
 ----------------
 
diff --git a/VERSION b/VERSION
index 2e0e38c..a2eecd4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.9
+1.10.dev0