diff --git a/setup.py b/setup.py
index 4a779a6a..0b19f3cb 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 with open("README.md", "r") as fh:
     long_description = fh.read()
 
-VERSION = "0.3.1"
+VERSION = "0.4.0"
 
 setup(name='clayrs',
       version=VERSION,