diff --git a/cmd/probod-bootstrap/CHANGELOG.md b/cmd/probod-bootstrap/CHANGELOG.md
index 13612daeb..6d95cc843 100644
--- a/cmd/probod-bootstrap/CHANGELOG.md
+++ b/cmd/probod-bootstrap/CHANGELOG.md
@@ -4,6 +4,16 @@ All notable changes to `probod-bootstrap` will be documented in this file.
 
 ## Unreleased
 
+## [0.4.0] - 2026-06-30
+
+### Added
+
+- `--format` flag: pass `--format json` to emit the resolved configuration as JSON instead of YAML
+
+### Fixed
+
+- Empty-valued env vars are now omitted from the generated configuration file
+
 ## [0.3.0] - 2026-06-30
 
 ### Added
diff --git a/cmd/probod-bootstrap/VERSION b/cmd/probod-bootstrap/VERSION
index 0d91a54c7..1d0ba9ea1 100644
--- a/cmd/probod-bootstrap/VERSION
+++ b/cmd/probod-bootstrap/VERSION
@@ -1 +1 @@
-0.3.0
+0.4.0