diff --git a/CHANGELOG.md b/CHANGELOG.md
index 451051777d8..b769b51a6d2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,15 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+### [1.51.1](https://github.com/rudderlabs/rudder-transformer/compare/v1.51.0...v1.51.1) (2023-12-06)
+
+
+### Bug Fixes
+
+* marketo backward compatibility ([#2880](https://github.com/rudderlabs/rudder-transformer/issues/2880)) ([af6aebb](https://github.com/rudderlabs/rudder-transformer/commit/af6aebba9a9891fadc91fe2dc4ae4db4b1e269c9))
+* marketo new field introduction backward compatibility ([cd6c3b0](https://github.com/rudderlabs/rudder-transformer/commit/cd6c3b0672a0b17078627f28f6613a2ef1898ee7))
+* remove ErrorResponse type from postTransfomration delivery ([b13f0a6](https://github.com/rudderlabs/rudder-transformer/commit/b13f0a6340177a56417692ad7dcf3829d4990826))
+
 ## [1.51.0](https://github.com/rudderlabs/rudder-transformer/compare/v1.50.1...v1.51.0) (2023-12-06)
 
 
diff --git a/package-lock.json b/package-lock.json
index 24e6a3bc3a2..27655f81ef6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "rudder-transformer",
-  "version": "1.51.0",
+  "version": "1.51.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "rudder-transformer",
-      "version": "1.51.0",
+      "version": "1.51.1",
       "license": "ISC",
       "dependencies": {
         "@amplitude/ua-parser-js": "^0.7.24",
diff --git a/package.json b/package.json
index 457c0eecf28..a36ac26e9c8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rudder-transformer",
-  "version": "1.51.0",
+  "version": "1.51.1",
   "description": "",
   "homepage": "https://github.com/rudderlabs/rudder-transformer#readme",
   "bugs": {