diff --git a/CHANGELOG.md b/CHANGELOG.md
index ae76399..54a693c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,20 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [3.1.0] - 2021-11-03
+
+### Added
+
+- Allow passing in Ajv instance in JSON Schema options [#133](https://github.com/kafkajs/confluent-schema-registry/pull/133)
+
+### Fixed
+
+- Fix backwards compatibility with older Schema Registry versions [#158](https://github.com/kafkajs/confluent-schema-registry/pull/158)
+
+### Fixed
+
+- Fix gateway config for when setting HTTP agent [#127](https://github.com/kafkajs/confluent-schema-registry/pull/127)
+
 ## [3.0.1] - 2021-06-11
 ### Fixed
 
diff --git a/docs/usage.md b/docs/usage.md
index c2829a6..bb7e758 100644
--- a/docs/usage.md
+++ b/docs/usage.md
@@ -284,4 +284,15 @@ const options = {
     strict: true
   }
 }
+```
+
+Alternatively, you can provide a custom Ajv instance using the `ajvInstance` option. This can be useful if you
+need to configure Ajv outside of what the constructor parameters allow.
+
+```ts
+const options = {
+  [SchemaType.JSON]: {
+    ajvInstance: new Ajv()
+  }
+}
 ```
\ No newline at end of file
diff --git a/package.json b/package.json
index 61d571a..cbf8802 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@kafkajs/confluent-schema-registry",
-  "version": "3.0.1",
+  "version": "3.1.0",
   "main": "dist/index.js",
   "description": "ConfluentSchemaRegistry is a library that makes it easier to interact with the Confluent schema registry, it provides convenient methods to encode, decode and register new schemas using the Apache Avro serialization format.",
   "keywords": [