diff --git a/CHANGELOG.md b/CHANGELOG.md
index 01d442c4..180af7f5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,13 @@ This project adheres to [Semantic Versioning](https://semver.org), except that 
 
 Do not manually edit this file. It will be automatically updated when a new release is published.
 
+## 0.4.0
+_01 March 2023_
+
+* (MINOR) Add --certs and --tree options ([#106](https://github.com/contentauth/c2pa-rs/pull/106))
+* update to cp2pa 0.17.0 ([#105](https://github.com/contentauth/c2pa-rs/pull/105))
+* Update for Clippy in Rust 1.67 ([#101](https://github.com/contentauth/c2pa-rs/pull/101))
+
 ## 0.3.9
 _06 December 2022_
 
diff --git a/Cargo.lock b/Cargo.lock
index 5ce25441..a7eda748 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -37,9 +37,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.66"
+version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "216261ddc8289130e551ddcd5ce8a064710c0d064a4d2895c67151c92b5443f6"
+checksum = "224afbd727c3d6e4b90103ece64b8d1b67fbb1973b1046c2281eed3f3803f800"
 
 [[package]]
 name = "arrayref"
@@ -315,7 +315,7 @@ dependencies = [
 
 [[package]]
 name = "c2patool"
-version = "0.3.9"
+version = "0.4.0"
 dependencies = [
  "anyhow",
  "assert_cmd",
diff --git a/Cargo.toml b/Cargo.toml
index b597ad03..b87de922 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,7 @@ name = "c2patool"
 # Please do not manually edit `version`. Version updates will be generated
 # automatically when c2patool is published. Remember to use (MINOR) or (MAJOR)
 # tags in the PR title to trigger non-patch updates as needed.
-version = "0.3.9"
+version = "0.4.0"
 
 description = "Command line tool for displaying and adding C2PA manifests"
 authors = ["Gavin Peacock <gpeacock@adobe.com>", "Maurice Fisher <mfisher@adobe.com>"]