diff --git a/CHANGELOG.md b/CHANGELOG.md
index 67bfff6907..70771235db 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,21 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [v3.78.0](https://github.com/buildkite/agent/tree/v3.78.0) (2024-08-20)
+[Full Changelog](https://github.com/buildkite/agent/compare/v3.77.0...v3.78.0)
+
+### Fixed
+- fix for layout issues with log messages [#2933](https://github.com/buildkite/agent/pull/2933) (@wolfeidau)
+- Prevent Cancel from running when a k8s job is cancelled already [#2935](https://github.com/buildkite/agent/pull/2935) (@CerealBoy)
+- k8s: Unconditionally set `BUILDKITE_AGENT_ACCESS_TOKEN` [#2942](https://github.com/buildkite/agent/pull/2942) (@DrJosh9000)
+
+### Changed
+- Add a bit more context to the debugging for failing signature verify [#2926](https://github.com/buildkite/agent/pull/2926) (@wolfeidau)
+- Update description for the 'priority' option for the 'buildkite-agent annotate' command. [#2934](https://github.com/buildkite/agent/pull/2934) (@gilesgas)
+
+### Internal
+Dependabot churn: [#2927](https://github.com/buildkite/agent/pull/2927), [#2928](https://github.com/buildkite/agent/pull/2928), [#2929](https://github.com/buildkite/agent/pull/2929), [#2930](https://github.com/buildkite/agent/pull/2930), [#2931](https://github.com/buildkite/agent/pull/2931), [#2937](https://github.com/buildkite/agent/pull/2937), [#2939](https://github.com/buildkite/agent/pull/2939), [#2940](https://github.com/buildkite/agent/pull/2940), [#2943](https://github.com/buildkite/agent/pull/2943) (@dependabot[bot])
+
 ## [v3.77.0](https://github.com/buildkite/agent/tree/v3.77.0) (2024-08-08)
 [Full Changelog](https://github.com/buildkite/agent/compare/v3.76.2...v3.77.0)
 
diff --git a/version/VERSION b/version/VERSION
index 867ce0835d..9801345582 100644
--- a/version/VERSION
+++ b/version/VERSION
@@ -1 +1 @@
-3.77.0
+3.78.0