diff --git a/CHANGES.rst b/CHANGES.rst
index b6c50f1..9ee01af 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -2,6 +2,15 @@ Changelog
 =========
 
 
+0.5.5 - Feb. 28, 2016
+----------------------
+- add a new staticmethod which can convert pinyin to upper, lower or capitalize.
+  https://github.com/lxneng/xpinyin/pull/28
+
+- Removed extraneous "!" being appended to non 'a' vowel replacements when show_tone_marks=True; also added simple unitest.main() for non-nose users
+  https://github.com/lxneng/xpinyin/pull/30
+
+
 0.5.4 - Dec. 14, 2015
 ----------------------
 
diff --git a/setup.py b/setup.py
index b84301c..3a2e4df 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@
 CHANGES = io.open(os.path.join(here, 'CHANGES.rst'), encoding='UTF-8').read()
 
 setup(name="xpinyin",
-      version='0.5.4',
+      version='0.5.5',
       description="translate chinese hanzi to pinyin by python",
       long_description=README + '\n\n' + CHANGES,
       classifiers=[