diff --git a/hls4ml/__init__.py b/hls4ml/__init__.py
index a794afc61e..afc902e320 100644
--- a/hls4ml/__init__.py
+++ b/hls4ml/__init__.py
@@ -1,6 +1,6 @@
 from __future__ import absolute_import
 
-__version__ = '0.5.0'
+__version__ = '0.5.0.b'
 
 from hls4ml import converters
 from hls4ml import report