diff --git a/CHANGELOG.md b/CHANGELOG.md
index 881e0ff386..e4dc241673 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 
-## Unreleased
+## [0.78.0] - 2024-08-27
 
 ### Added
 
@@ -2318,6 +2318,7 @@ https://textual.textualize.io/blog/2022/11/08/version-040/#version-040
 - New handler system for messages that doesn't require inheritance
 - Improved traceback handling
 
+[0.78.0]: https://github.com/Textualize/textual/compare/v0.77.0...v0.78.0
 [0.77.0]: https://github.com/Textualize/textual/compare/v0.76.0...v0.77.0
 [0.76.0]: https://github.com/Textualize/textual/compare/v0.75.1...v0.76.0
 [0.75.1]: https://github.com/Textualize/textual/compare/v0.75.0...v0.75.1
diff --git a/pyproject.toml b/pyproject.toml
index b0108d8379..a9dbb4ac99 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "textual"
-version = "0.77.0"
+version = "0.78.0"
 homepage = "https://github.com/Textualize/textual"
 repository = "https://github.com/Textualize/textual"
 documentation = "https://textual.textualize.io/"