diff --git a/CHANGELOG.md b/CHANGELOG.md
index 550b5b5..fd4505d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # OpenXC Message Format Changelog
 
-## v0.4-dev
+## v0.4
 
 * BREAKING: Removed factor and offset from diagnostic requests to minimize the number of
   fields, and since this is such an uncommon use case and one that can be
diff --git a/README.md b/README.md
index 29baa3a..b078bf0 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # OpenXC Message Format Specification
 
-Version: v0.4-dev
+Version: v0.4
 
 This specification is a part of the [OpenXC platform][OpenXC].