diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 0ee8c01..2537c1f 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.3.0"
+  ".": "0.4.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 359d224..7530247 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog
 
+## [0.4.0](https://github.com/UnDumpd/agent/compare/v0.3.0...v0.4.0) (2026-08-17)
+
+
+### Features
+
+* apply min_age default/validation to S3 sources ([c072ea8](https://github.com/UnDumpd/agent/commit/c072ea896244c30b97e9b707d839c900155ff010))
+* restore-test MongoDB dumps from a local mongodump directory ([cf78499](https://github.com/UnDumpd/agent/commit/cf78499aba2dbee21ce125e120328f2de490abf5))
+* restore-test MongoDB dumps from an S3 prefix ([3730008](https://github.com/UnDumpd/agent/commit/37300080f931aec5704e4d73136bc5e21dd4b5cd))
+
 ## [0.3.0](https://github.com/UnDumpd/agent/compare/v0.2.0...v0.3.0) (2026-07-27)
 
 
diff --git a/cmd/undump/main.go b/cmd/undump/main.go
index 0252c74..1684c97 100644
--- a/cmd/undump/main.go
+++ b/cmd/undump/main.go
@@ -19,7 +19,7 @@ import (
 	"undump/internal/sources"
 )
 
-const version = "0.3.0" // x-release-please-version
+const version = "0.4.0" // x-release-please-version
 
 func main() {
 	root := &cobra.Command{