diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 6eb647f..2537c1f 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.3.13"
+  ".": "0.4.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 99a5896..27150bb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [0.4.0](https://github.com/elixir-tools/spitfire/compare/v0.3.13...v0.4.0) (2026-08-04)
+
+
+### Features
+
+* add Spitfire.Env.expand_with_cursor_envs/3 ([#140](https://github.com/elixir-tools/spitfire/issues/140)) ([5f10ec2](https://github.com/elixir-tools/spitfire/commit/5f10ec223043dcd7712388e5b15a23a556c4b673))
+
+
+### Bug Fixes
+
+* remove redundant type checks flagged by compiler ([#138](https://github.com/elixir-tools/spitfire/issues/138)) ([89ee841](https://github.com/elixir-tools/spitfire/commit/89ee841f7fb343fbc2edb8d317d3b3b17abd94c6))
+
 ## [0.3.13](https://github.com/elixir-tools/spitfire/compare/v0.3.12...v0.3.13) (2026-06-06)
 
 
diff --git a/mix.exs b/mix.exs
index faf3f74..bef9557 100644
--- a/mix.exs
+++ b/mix.exs
@@ -7,7 +7,7 @@ defmodule Spitfire.MixProject do
     [
       app: :spitfire,
       description: "Error resilient parser for Elixir",
-      version: "0.3.13",
+      version: "0.4.0",
       elixir: "~> 1.15",
       start_permanent: Mix.env() == :prod,
       deps: deps(),