diff --git a/CHANGES.md b/CHANGES.md
index 2726ecf..749f663 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,8 @@
 # jpy Changelog
 
-## Version 0.20.0 (in development)
+## Version 1.0.0 (in development)
+* [#176](https://github.com/jpy-consortium/jpy/pull/176) fix:  make PyObject cleanup thread-safe in free-threaded Python and reduce contention
+* [#175](https://github.com/jpy-consortium/jpy/pull/175) Update project's Development Status classifier
 
 ## Version 0.19.0
 * [#165](https://github.com/jpy-consortium/jpy/pull/165) feat: free-threaded Python (3.13.0+) support
diff --git a/jpyutil.py b/jpyutil.py
index a296d08..869a0a0 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__ = "0.20.0.dev0"
+__version__ = "1.0.0.dev0"
 
 
 # Setup a dedicated logger for jpyutil.
diff --git a/pom.xml b/pom.xml
index cc36419..031ae40 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
 
     <groupId>org.jpyconsortium</groupId>
     <artifactId>jpy</artifactId>
-    <version>0.20.0-SNAPSHOT</version>
+    <version>1.0.0-SNAPSHOT</version>
     <packaging>jar</packaging>
     <name>Java-Python Bridge</name>