diff --git a/CHANGELOG.md b/CHANGELOG.md
index 292793d1..9b2522c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,15 @@
 ## [Unreleased]
 
 
+## [1.2.1] - 2023-09-14
+
+New:
+- Support for Kotlin 1.9.10
+- Switch to JetBrains Compose compiler 1.5.2 (based on AndroidX Compose compiler 1.5.3)
+
+This version works with Kotlin 1.9.10 by default.
+
+
 ## [1.2.0] - 2023-08-09
 
 New:
diff --git a/README.md b/README.md
index 5365c230..6f012418 100644
--- a/README.md
+++ b/README.md
@@ -171,7 +171,7 @@ buildscript {
     mavenCentral()
   }
   dependencies {
-    classpath 'app.cash.molecule:molecule-gradle-plugin:1.2.0'
+    classpath 'app.cash.molecule:molecule-gradle-plugin:1.2.1'
   }
 }
 
@@ -183,6 +183,7 @@ certain versions of Kotlin.
 
 | Kotlin | Molecule       |
 |--------|----------------|
+| 1.9.10 | 1.2.1          |
 | 1.9.0  | 1.1.0 - 1.2.0  |
 | 1.8.22 | 0.11.0 - 1.0.0 |
 | 1.8.21 | 0.10.0         |
diff --git a/gradle.properties b/gradle.properties
index a2549357..c661f966 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,7 +1,7 @@
 GROUP=app.cash.molecule
 
 # HEY! If you change the major version here be sure to update release.yaml doc target folder!
-VERSION_NAME=1.3.0-SNAPSHOT
+VERSION_NAME=1.2.1
 
 SONATYPE_AUTOMATIC_RELEASE=true
 SONATYPE_HOST=DEFAULT