diff --git a/CHANGELOG.md b/CHANGELOG.md
index d6c2511..69b04e4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-# Upcoming Version
+# 1.0
 
 - Feature: Fail twine commands if there's more than one formatter candidate (#201)
 - Feature: In the Apple formatter, use developer language for the base localization (#219)
diff --git a/lib/twine/version.rb b/lib/twine/version.rb
index d289a0c..ddaa0ea 100644
--- a/lib/twine/version.rb
+++ b/lib/twine/version.rb
@@ -1,3 +1,3 @@
 module Twine
-  VERSION = '0.10.1'
+  VERSION = '1.0'
 end