diff --git a/cylc/flow/__init__.py b/cylc/flow/__init__.py
index 06225eeef1d..372c8b39560 100644
--- a/cylc/flow/__init__.py
+++ b/cylc/flow/__init__.py
@@ -46,7 +46,7 @@ def environ_init():
 
 environ_init()
 
-__version__ = '8.1.1'
+__version__ = '8.1.2.dev'
 
 
 def iter_entry_points(entry_point_name):