diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 755adef72..79d49ad08 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "4.0.5"
+  ".": "4.0.6"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f678ef94..80f8849af 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,18 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+## [4.0.6](https://github.com/rickstaa/stable-learning-control/compare/v4.0.5...v4.0.6) (2023-07-09)
+
+
+### Bug Fixes
+
+* fix 'test_policy' rendering ([#291](https://github.com/rickstaa/stable-learning-control/issues/291)) ([48443ca](https://github.com/rickstaa/stable-learning-control/commit/48443ca1b15854b00f67272ab88a2766624d5530))
+
+
+### Documentation
+
+* improve documentation defaults ([be99008](https://github.com/rickstaa/stable-learning-control/commit/be990083f951c8cb12ee30948d12cb3db2864913))
+
 ## [4.0.5](https://github.com/rickstaa/stable-learning-control/compare/v4.0.4...v4.0.5) (2023-07-06)
 
 
diff --git a/package.json b/package.json
index a31713538..02aaa62ff 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "stable-learning-control",
-  "version": "4.0.5",
+  "version": "4.0.6",
   "description": "A framework for training theoretically stable (and robust) Reinforcement Learning control algorithms.",
   "keywords": [
     "reinforcement-learning",
diff --git a/stable_learning_control/version.py b/stable_learning_control/version.py
index e3aa4aa08..814a309a6 100644
--- a/stable_learning_control/version.py
+++ b/stable_learning_control/version.py
@@ -1,3 +1,3 @@
 # Stores the package version number so that it can be accessed from other modules.
-__version__ = "4.0.5"
+__version__ = "4.0.6"
 __version_tuple__ = __version__.split(".")