diff --git a/CHANGES.md b/CHANGES.md
index ad7e4ab6..d69f4957 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,7 @@
 # jpy Changelog
 
+## Version 0.13.0 (in development)
+
 ## Version 0.12.0
 * [#88](https://github.com/jpy-consortium/jpy/pull/88) Use valueOf() to box primitive values instead of creating new objects every time
 * [#89](https://github.com/jpy-consortium/jpy/pull/89) Add Java process lookup for 'java.home' in find_jvm_dll_file()
diff --git a/jpyutil.py b/jpyutil.py
index 37cdf89b..8e9f6332 100644
--- a/jpyutil.py
+++ b/jpyutil.py
@@ -36,7 +36,7 @@
 __author__ = "Norman Fomferra (Brockmann Consult GmbH) and contributors"
 __copyright__ = "Copyright 2015-2018 Brockmann Consult GmbH and contributors"
 __license__ = "Apache 2.0"
-__version__ = "0.12.0"
+__version__ = "0.13.0.dev0"
 
 
 # Setup a dedicated logger for jpyutil.
diff --git a/pom.xml b/pom.xml
index 61f68a6d..4b8ad6e3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
 
     <groupId>org.jpyconsortium</groupId>
     <artifactId>jpy</artifactId>
-    <version>0.12.0</version>
+    <version>0.13.0-SNAPSHOT</version>
     <packaging>jar</packaging>
     <name>Java-Python Bridge</name>