diff --git a/azure/functions/__init__.py b/azure/functions/__init__.py
index d91d70eb..7dd45df9 100644
--- a/azure/functions/__init__.py
+++ b/azure/functions/__init__.py
@@ -97,4 +97,4 @@
     'HttpMethod'
 )
 
-__version__ = '1.19.0'
+__version__ = '1.20.0b1'