diff --git a/CHANGELOG.md b/CHANGELOG.md
index e50c3a5..8b9430c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+## [0.6.21] - 2024-03-06
+
 - Support combining `--ignore-unknown-features` and `--group-features`. ([#240](https://github.com/taiki-e/cargo-hack/pull/240), thanks @kornelski)
 
 ## [0.6.20] - 2024-02-21
@@ -471,7 +473,8 @@ See [#89](https://github.com/taiki-e/cargo-hack/pull/89) for more.
 
 Initial release
 
-[Unreleased]: https://github.com/taiki-e/cargo-hack/compare/v0.6.20...HEAD
+[Unreleased]: https://github.com/taiki-e/cargo-hack/compare/v0.6.21...HEAD
+[0.6.21]: https://github.com/taiki-e/cargo-hack/compare/v0.6.20...v0.6.21
 [0.6.20]: https://github.com/taiki-e/cargo-hack/compare/v0.6.19...v0.6.20
 [0.6.19]: https://github.com/taiki-e/cargo-hack/compare/v0.6.18...v0.6.19
 [0.6.18]: https://github.com/taiki-e/cargo-hack/compare/v0.6.17...v0.6.18
diff --git a/Cargo.toml b/Cargo.toml
index 43f2b09..5d127d4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cargo-hack"
-version = "0.6.20" #publish:version
+version = "0.6.21" #publish:version
 edition = "2021"
 rust-version = "1.70"
 license = "Apache-2.0 OR MIT"