diff --git a/CHANGELOG.md b/CHANGELOG.md
index 02563ddac..729bbe4f3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,7 +15,9 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
     _Security_ in case of vulnerabilities.
  -->
 
-## [Unreleased](https://github.com/o1-labs/o1js/compare/f15293a69...HEAD)
+## [Unreleased](https://github.com/o1-labs/o1js/compare/7e9394...HEAD)
+
+## [1.9.1](https://github.com/o1-labs/o1js/compare/f15293a69...7e9394) - 2024-10-15
 
 ### Fixes
 
diff --git a/package-lock.json b/package-lock.json
index 7157634fa..32a418c28 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "o1js",
-  "version": "1.9.0",
+  "version": "1.9.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "o1js",
-      "version": "1.9.0",
+      "version": "1.9.1",
       "license": "Apache-2.0",
       "dependencies": {
         "blakejs": "1.2.1",
diff --git a/package.json b/package.json
index d8ecf67bb..1c5896d26 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "o1js",
   "description": "TypeScript framework for zk-SNARKs and zkApps",
-  "version": "1.9.0",
+  "version": "1.9.1",
   "license": "Apache-2.0",
   "homepage": "https://github.com/o1-labs/o1js/",
   "repository": {