diff --git a/changelog.rst b/changelog.rst
index 2be969b..43e85fd 100644
--- a/changelog.rst
+++ b/changelog.rst
@@ -2,7 +2,7 @@
  Changelog
 ===========
 
-0.42 (unreleased)
+0.42 (2018-06-19)
 =================
 
 - Various bug fixes.
diff --git a/setup.py b/setup.py
index 56b9f2f..1ed7266 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@ def _read_file(name):
 
 setup(
     name='azanium',
-    version='0.42.dev0',
+    version='0.42',
     url='http://www.wormmbase.org/',
     author='Matt Russell, EMBL-EBI',
     author_email='matthew.russell@wormbase.org',