diff --git a/bonito/__init__.py b/bonito/__init__.py
index 293667b0..65d28ba3 100644
--- a/bonito/__init__.py
+++ b/bonito/__init__.py
@@ -5,7 +5,7 @@
     'basecaller', 'train', 'evaluate', 'view', 'convert', 'download', 'export', 'duplex',
 ]
 
-__version__ = '0.3.8'
+__version__ = '0.4.0'
 
 
 def main():