diff --git a/CHANGELOG.md b/CHANGELOG.md
index 073c36a..50017fa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.4.0](https://github.com/sbrow/envr/compare/v0.3.0...v0.4.0) (2026-06-17)
+
+
+### Features
+
+* Replaced `fd` with custom internals. ([ba647f5](https://github.com/sbrow/envr/commit/ba647f51c17b694033b4f13c06b38071305cc09d))
+
 ## [0.3.0](https://github.com/sbrow/envr/compare/v0.2.1...v0.3.0) (2026-06-16)
 
 Version 0.3.0 represents a significant departure (and improvement) for envr.
diff --git a/version.txt b/version.txt
index 0d91a54..1d0ba9e 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-0.3.0
+0.4.0