diff --git a/cylc/rose/__init__.py b/cylc/rose/__init__.py
index d5dc797b..a14d3a5d 100644
--- a/cylc/rose/__init__.py
+++ b/cylc/rose/__init__.py
@@ -205,4 +205,4 @@
 
 """
 
-__version__ = '1.3.3'
+__version__ = '1.3.4.dev'