diff --git a/cnvlib/_version.py b/cnvlib/_version.py
index 3e539485..d69d16e9 100644
--- a/cnvlib/_version.py
+++ b/cnvlib/_version.py
@@ -1 +1 @@
-__version__ = "0.9.1.dev0"
+__version__ = "0.9.1"