diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0ed6772f1aa02d429eef8fcccded5f86415a9c55..adae924d16f9d0627e798ee8f4cc844ebb6677d3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,4 @@
 Changelog is kept at [GitHub](https://github.com/Dronehub/minijson/releases),
 here's only the changelog for the version in development
 
-# v2.4
-
-* added argument default
-* fixing issue with serializing classes that subclass dict, list and tuple
+# v2.5
diff --git a/setup.cfg b/setup.cfg
index fdc3ec5faf309c570db01f13c703a2c2a982ea9d..c840efff012fd3d8fce4e13d13a13d12052240ff 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 # coding: utf-8
 [metadata]
-version = 2.4
+version = 2.5a1
 name = minijson
 long_description = file: README.md
 long_description_content_type = text/markdown; charset=UTF-8