diff --git a/CHANGELOG.md b/CHANGELOG.md
index 624cabe1..1dfbac1b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## Unreleased
+## 4.2.1
 ### Added
 - Added `toString` implementations to options and arguments. ([#434](https://github.com/ajalt/clikt/issues/434))
 - Added `CliktCommand.test` overload that takes a vararg of `String`s as the command line arguments. Thanks to @sschuberth for the contribution ([#451](https://github.com/ajalt/clikt/issues/451))
diff --git a/README.md b/README.md
index 07f9b715..2363feca 100644
--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@ Clikt is distributed through [Maven Central](https://search.maven.org/artifact/c
 
 ```groovy
 dependencies {
-   implementation("com.github.ajalt.clikt:clikt:4.2.0")
+   implementation("com.github.ajalt.clikt:clikt:4.2.1")
 }
 ```
 
diff --git a/gradle.properties b/gradle.properties
index 12531ca1..7b5030e7 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,4 +1,4 @@
-VERSION_NAME=4.2.0
+VERSION_NAME=4.2.1
 
 # Silence the compile warning that MPP is experimental
 kotlin.mpp.stability.nowarn=true