diff --git a/src/cdtools/_version.py b/src/cdtools/_version.py
index 9163035..260c070 100644
--- a/src/cdtools/_version.py
+++ b/src/cdtools/_version.py
@@ -1 +1 @@
-__version__ = "0.3.1.dev"
+__version__ = "0.3.1"