diff --git a/CHANGELOG.md b/CHANGELOG.md
index 74ab8c00..81f7e20a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,15 @@
 Shellous Change Log
 ===================
 
+0.27.0
+------
+
+- [FEATURE] Add experimental `Prompt` class for working with interactive prompts in a co-process.
+- [API] The `DefaultChildWatcher` class has been downgraded to an experimental-only feature.
+- [API] The `AUDIT_EVENT_SUBPROCESS_SPAWN` and `UNLAUNCHED_EXIT_CODE` constants are no longer part of the public/documented API. Internally, they were renamed.
+- [LATERAL] The methods of the internal `Options` class are now deliberately marked private, as they are not part of the public/documented API.
+- [LATERAL] Removed support for using Ellipsis as a special value when setting environment variables.
+
 0.26.0
 ------
 
diff --git a/pyproject.toml b/pyproject.toml
index 5435b8fa..2fbdf983 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "shellous"
-version = "0.26.0"
+version = "0.27.0"
 description = "Async Processes and Pipelines"
 license = "Apache-2.0"
 authors = ["Bill Fisher <william.w.fisher@gmail.com>"]
diff --git a/shellous/__init__.py b/shellous/__init__.py
index 17f6b3ac..3ec19a33 100644
--- a/shellous/__init__.py
+++ b/shellous/__init__.py
@@ -5,7 +5,7 @@
 # pylint: disable=cyclic-import
 # pyright: reportUnusedImport=false
 
-__version__ = "0.26.0"
+__version__ = "0.27.0"
 
 import sys
 import warnings