diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ad58f5..a2e195b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+## v1.5.0 - 2026-04-21
+
 ### Added
 
 - new `nanoda` input to check environment with [nanoda](https://github.com/ammkrn/nanoda_lib) external type checker
@@ -19,6 +21,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - rename the `lean4checker` input to `leanchecker`, while keeping `lean4checker` as a deprecated alias
 - use the bundled `leanchecker` binary on Lean `nightly-2026-01-09` / `v4.28.0-rc1` and newer, with fallback to the external `lean4checker` repository on older toolchains
 
+### Fixed
+- fixed bug where callling `.test.sh` instead of `lake test` on lean4checker on Lean `v4.27.x` would cause a failure
+
 ## v1.4.0 - 2026-01-15
 
 ### Added