diff --git a/pyprof2html/__init__.py b/pyprof2html/__init__.py
index 342eb6d..74b3392 100644
--- a/pyprof2html/__init__.py
+++ b/pyprof2html/__init__.py
@@ -10,3 +10,5 @@ __licence__ = 'New BSD License'
 __author__ = 'Hideo Hattori <hhatto.jp@gmail.com>'
 
 __all__ = ['Converter', 'pyprof2html_main']
+
+__version__ = '0.3.1'
