diff --git a/HISTORY.rst b/HISTORY.rst
index 3addd006a..961373635 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -2,7 +2,10 @@
 Changelog
 =========
 
-* `master <https://github.com/svenkreiss/pysparkling/compare/v0.2.24...master>`_
+* `master <https://github.com/svenkreiss/pysparkling/compare/v0.2.28...master>`_
+* `v0.2.28 <https://github.com/svenkreiss/pysparkling/compare/v0.2.24...v0.2.28>`_ (2015-07-03)
+    * implement ``RDD.sortBy()`` and ``RDD.sortByKey()``
+    * additional unit tests
 * `v0.2.24 <https://github.com/svenkreiss/pysparkling/compare/v0.2.23...v0.2.24>`_ (2015-06-16)
     * replace dill with cloudpickle in docs and test
     * add tests with pypy and pypy3
diff --git a/pysparkling/__init__.py b/pysparkling/__init__.py
index ce63152e3..1d5416fbb 100644
--- a/pysparkling/__init__.py
+++ b/pysparkling/__init__.py
@@ -1,6 +1,6 @@
 """pysparkling module."""
 
-__version__ = '0.2.27'
+__version__ = '0.2.28'
 
 from .exceptions import (FileAlreadyExistsException,
                          ConnectionException)