diff --git a/reana_commons/version.py b/reana_commons/version.py
index c6b0fe79..3ccce298 100755
--- a/reana_commons/version.py
+++ b/reana_commons/version.py
@@ -14,4 +14,4 @@
 
 from __future__ import absolute_import, print_function
 
-__version__ = "0.9.4a2"
+__version__ = "0.9.4a4"