diff --git a/src/conductor/__init__.py b/src/conductor/__init__.py
index 36bb562..05767aa 100644
--- a/src/conductor/__init__.py
+++ b/src/conductor/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "0.3.0+dev"
+__version__ = "0.4.0"
 
 __author__ = "Geoffrey Yu"
 __email__ = "geoffxy@gmail.com"