diff --git a/CHANGELOG.md b/CHANGELOG.md
index e9cd0042..65a9ee23 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # CHANGELOG
 
+## v0.4 - 11.11.2025
+* Support for Python 3.8 discontinued
+* Guide on implementing a custom space/kernel by @vabor112 in https://github.com/geometric-kernels/GeometricKernels/pull/159
+* GPJax>=0.12.2 support by @stoprightthere in https://github.com/geometric-kernels/GeometricKernels/pull/162
+* Comprehensible exceptions by @stoprightthere in https://github.com/geometric-kernels/GeometricKernels/pull/160
+* CI improvements by @stoprightthere in https://github.com/geometric-kernels/GeometricKernels/pull/161 and https://github.com/geometric-kernels/GeometricKernels/pull/163
+
 ## v0.3.1 - 21.07.2025
 * Example Applications by @vabor112 in https://github.com/geometric-kernels/GeometricKernels/pull/157
 
diff --git a/pyproject.toml b/pyproject.toml
index 12f3ff2b..5c96e299 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ dependencies = [
     "spherical-harmonics-basis",
     "sympy~=1.13",
 ]
-version="0.3.1"
+version="0.4"
 
 [project.urls]
 Documentation = "https://geometric-kernels.github.io/"