diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0daf2325d..fb3b217e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.21.1](https://github.com/TimelyDataflow/timely-dataflow/compare/timely-v0.21.0...timely-v0.21.1) - 2025-06-17
+
+### Other
+
+- Fix nightly compile warnings ([#670](https://github.com/TimelyDataflow/timely-dataflow/pull/670))
+- Avoid compile warnings on nightly ([#669](https://github.com/TimelyDataflow/timely-dataflow/pull/669))
+- Derive Copy
+
 ## [0.21.0](https://github.com/TimelyDataflow/timely-dataflow/compare/timely-v0.20.0...timely-v0.21.0) - 2025-05-09
 
 ### Other
diff --git a/timely/Cargo.toml b/timely/Cargo.toml
index 49ba14b7d..92f088d93 100644
--- a/timely/Cargo.toml
+++ b/timely/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 
 name = "timely"
-version = "0.21.0"
+version = "0.21.1"
 authors = ["Frank McSherry <fmcsherry@me.com>"]
 readme = "../README.md"
 edition.workspace = true