diff --git a/CHANGELOG.md b/CHANGELOG.md
index ed44385b..5c1302dc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## UNRELEASED
+## 0.4.0 (December 20, 2023)
 
 FEATURES:
  * **High Availability**: Added support for high availability by allowing multiple instances of the autoscaler to run at the same time, but having only one actively executing [[GH-649](https://github.com/hashicorp/nomad-autoscaler/pull/649)]
diff --git a/version/version.go b/version/version.go
index 527ff106..f97d4875 100644
--- a/version/version.go
+++ b/version/version.go
@@ -18,12 +18,12 @@ var (
 	//
 	// Version must conform to the format expected by github.com/hashicorp/go-version
 	// for tests to work.
-	Version = "0.3.8"
+	Version = "0.4.0"
 
 	// A pre-release marker for the version. If this is "" (empty string)
 	// then it means that it is a final release. Otherwise, this is a pre-release
 	// such as "dev" (in development), "beta.1", "rc.1", etc.
-	VersionPrerelease = "dev"
+	VersionPrerelease = ""
 
 	// VersionMetadata is metadata further describing the build type.
 	VersionMetadata = ""