diff --git a/screenpro/__init__.py b/screenpro/__init__.py
index d7b52e0..036f773 100644
--- a/screenpro/__init__.py
+++ b/screenpro/__init__.py
@@ -9,6 +9,6 @@
 from .ngs import GuideCounter
 from .assays import PooledScreens, GImaps
 
-__version__ = "0.3.5"
+__version__ = "0.4.0"
 __author__ = "Abe Arab"
 __email__ = 'abea@arcinstitute.org' # "abarbiology@gmail.com"