diff --git a/CHANGES.rst b/CHANGES.rst
index 16fe217..c5cda65 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,11 @@
 CHANGES
 =======
 
+2.0a4 (2017-04-05)
+------------------
+
+- Update uchardet repo (Fix buffer overflow)
+
 2.0a3 (2017-03-29)
 ------------------
 
diff --git a/src/cchardet/version.py b/src/cchardet/version.py
index c56f62c..bbf64a4 100644
--- a/src/cchardet/version.py
+++ b/src/cchardet/version.py
@@ -1 +1 @@
-__version__ = '2.0a3'
+__version__ = '2.0a4'