diff --git a/CHANGELOG b/CHANGELOG
index 0031beb91337e681884cd5a1d8c420a099a27861..b53d52720c420583973bee58f8ba2b290f0879af 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,8 @@
+# Version 0.4.0 (December 2024)
+
 # Version 0.2.1 (May 14, 2024)
 
-* rework export mechanism 
+* rework export mechanism
 * change `Operator::computeOutputDims()` with `Operator::forwardDims()`
 * automatic docstring decorators for python
 * add implementation of Operators only performing data/format manipulation
diff --git a/version.txt b/version.txt
index 0d91a54c7d439e84e3dd17d3594f1b2b6737f430..1d0ba9ea182b0f7354f3daf12120744ec5e0c2f8 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-0.3.0
+0.4.0