diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 9bbee039b..7042852f5 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -3,6 +3,11 @@
     Please keep this file at 72 line width so that we can copy-paste
     the release logs directly into commit messages.
 
+0.0.27rc5 (2026-10-31)
+======================
+We pre-release with JSON null in JSON-able values and negated None
+checks rewritten as ``x is not None`` in Python.
+
 0.0.27rc4 (2026-10-28)
 ======================
 We pre-release for the Python SDK of V3.2 of the AAS meta-model, which
diff --git a/aas_core_codegen/__init__.py b/aas_core_codegen/__init__.py
index a9b256bc3..22a408d53 100644
--- a/aas_core_codegen/__init__.py
+++ b/aas_core_codegen/__init__.py
@@ -1,6 +1,6 @@
 """Generate implementations and schemas based on an AAS meta-model."""
 
-__version__ = "0.0.27rc4"
+__version__ = "0.0.27rc5"
 __author__ = "Marko Ristin, Nico Braunisch"
 __license__ = "License :: OSI Approved :: MIT License"
 __status__ = "Production/Stable"
diff --git a/pyproject.toml b/pyproject.toml
index 7a9914af9..2a4ff8a3b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 name = "aas-core-codegen"
 # NOTE (mristin):
 # Do not forget to update the CHANGELOG.rst and __init__.py!
-version = "0.0.27rc4"
+version = "0.0.27rc5"
 description = "Generate implementations and schemas based on an AAS meta-model."
 readme = "README.rst"
 authors = [