diff --git a/CHANGES.rst b/CHANGES.rst
index 0013690..cf49550 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -3,7 +3,7 @@
 =========
 
 
-1.0.0a12 (unreleased)
+1.0.0a12 (2018-09-11)
 =====================
 
 - Add support for zope.schema 4.7.0 and nti.schema 1.5.0. Drop support
diff --git a/setup.py b/setup.py
index 33c46f1..af54bff 100755
--- a/setup.py
+++ b/setup.py
@@ -130,7 +130,7 @@ def _c(m):
 
 setup(
     name='nti.externalization',
-    version='1.0.0a12.dev0',
+    version='1.0.0a12',
     author='Jason Madden',
     author_email='jason@nextthought.com',
     description="NTI Externalization",