diff --git a/src/durabletask/setup.py b/src/durabletask/setup.py
index 043eb2dee26..f6a1dc4bc44 100644
--- a/src/durabletask/setup.py
+++ b/src/durabletask/setup.py
@@ -10,7 +10,7 @@
 
 
 # HISTORY.rst entry.
-VERSION = '1.0.0b3'
+VERSION = '1.0.0b4'
 
 # The full list of classifiers is available at
 # https://pypi.python.org/pypi?%3Aaction=list_classifiers