diff --git a/stressor/__init__.py b/stressor/__init__.py
index a468832..1f1330a 100644
--- a/stressor/__init__.py
+++ b/stressor/__init__.py
@@ -16,4 +16,4 @@
     "3.0.0a4" seems not to work in this case!
 """
 # flake8: noqa
-__version__ = "0.5.1-a1"
+__version__ = "0.5.1"