diff --git a/docs/Release_notes.md b/docs/Release_notes.md
index fa7cf4c..f01d9d3 100644
--- a/docs/Release_notes.md
+++ b/docs/Release_notes.md
@@ -11,6 +11,14 @@
 
 <!--next-version-placeholder-->
 
+## v0.4.0 (2022-05-05)
+### Feature
+* **scar.model:** Addition of a sparsity parameter ([#44](https://github.com/Novartis/scAR/issues/44)) ([`0c30046`](https://github.com/Novartis/scAR/commit/0c30046aa8d20be88f516b8756789d9fab515b10))
+* **scar.main:** Introduce a sparsity parameter ([`cd33fdd`](https://github.com/Novartis/scAR/commit/cd33fddbd6d7117f459e12b57a936148cde0563f))
+
+### Documentation
+* Modify Changlog.md ([`deb920c`](https://github.com/Novartis/scAR/commit/deb920cdaa3b81a7d6dbccc85231bfa87236cee6))
+
 -------------------------------------
 ## v0.3.6_coming
 ### Feature
diff --git a/scar/main/__version__.py b/scar/main/__version__.py
index 08cf4fa..3a3ca11 100644
--- a/scar/main/__version__.py
+++ b/scar/main/__version__.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
 """version here"""
 
-__version__ = "0.3.5"
+__version__ = "0.4.0"
 _copyright = "2022, Novartis Institute for BioMedical Research"