diff --git a/CHANGELOG.md b/CHANGELOG.md
index 41e22ba..efd5db9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
+## [2.0a6] - 2024-07-26
+
+### Fixed
+
+- Fixed `required_update_neighborhood` methods, changing the return type to list[IntegralSiteCoordinate].
+
+
 ## [2.0a5] - 2024-07-12
 
 ### Added
diff --git a/pyproject.toml b/pyproject.toml
index 11db1cc..8f0c9ee 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "libcasm-clexulator"
-version = "2.0a5"
+version = "2.0a6"
 authors = [
   { name="CASM developers", email="casm-developers@lists.engr.ucsb.edu" },
 ]
diff --git a/python/doc/conf.py b/python/doc/conf.py
index 0c6f89c..4fc5e6c 100644
--- a/python/doc/conf.py
+++ b/python/doc/conf.py
@@ -3,7 +3,7 @@
 # -- package specific configuration --
 project = "libcasm-clexulator"
 version = "2.0"  # The short X.Y version.
-release = "2.0a5"  # The full version, including alpha/beta/rc tags.
+release = "2.0a6"  # The full version, including alpha/beta/rc tags.
 project_desc = "CASM cluster expansion calculator (clexulator) module"
 logo_text = "libcasm-clexulator"
 github_url = "https://github.com/prisms-center/CASMcode_clexulator/"
diff --git a/python/setup.py b/python/setup.py
index 2b37b7e..1259c20 100644
--- a/python/setup.py
+++ b/python/setup.py
@@ -1,6 +1,6 @@
 import os
 
-__version__ = "2.0a5"
+__version__ = "2.0a6"
 
 # Available at setup time due to pyproject.toml
 from pybind11.setup_helpers import Pybind11Extension, build_ext
diff --git a/setup.py b/setup.py
index f9f06a2..d17ba2c 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 
 setup(
     name="libcasm-clexulator",
-    version="2.0a5",
+    version="2.0a6",
     packages=["libcasm", "libcasm.clexulator"],
     package_dir={"": "python"},
     cmake_install_dir="python/libcasm",