diff --git a/ctwrap/_version.py b/ctwrap/_version.py
index 8626bbd..e8afb9f 100644
--- a/ctwrap/_version.py
+++ b/ctwrap/_version.py
@@ -3,7 +3,7 @@
 """
 
 __author__ = "I. Schoegl and D. Akinpelu"
-__version_info__ = (0, 3, 3)
+__version_info__ = (0, 4, 0)
 __version__ = '.'.join(map(str, __version_info__[:3]))
 if len(__version_info__) == 4:
     __version__ += __version_info__[-1]