diff --git a/README.md b/README.md
index 88679f4..608dcae 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,9 @@
 # node-vault
 
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+[![Build Status](https://img.shields.io/github/actions/workflow/status/nodevault/node-vault/lint-and-test.yaml?branch=master&style=flat-square)](https://github.com/nodevault/node-vault/actions/workflows/lint-and-test.yaml)
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+[![NPM Version](https://img.shields.io/npm/v/node-vault?style=flat-square)](https://www.npmjs.com/package/node-vault)
+[![License](https://img.shields.io/npm/l/node-vault?style=flat-square)](https://github.com/nodevault/node-vault/blob/master/LICENSE)
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@@ -11,79 +11,182 @@ A client for the HTTP API of HashiCorp's [Vault] written for Node.js.
 
 
 ## Install
+
 Prerequisites:
- - NodeJS >= `16.0.0`
+ - Node.js >= `18.0.0`
 
 ```bash
 npm install -S node-vault
 ```
 
-> The year is 2023; If, for whatever reason, you need to use an older version of node.js (yet still `>= 6.x`), use `node-vault <= v0.10.0`
->
-> Please note that `node-vault <= v0.10.0` contains multiple vulnerabilities ☠️
+> **Note:** If you need to use an older version of Node.js (>= 6.x), use `node-vault <= v0.10.0`.
+> Please be aware that `node-vault <= v0.10.0` contains multiple known vulnerabilities ☠️
+
+TypeScript definitions are included in the package.
 
 
 ## Test
 
-Run tests using docker-compose (includes vault, postgres and running the tests inside) with:
+Run tests using docker-compose (includes vault and postgres) with:
 ```bash
 docker-compose up --force-recreate test
 ```
 
+## Configuration
+
+### Client Options
+
+```javascript
+const vault = require('node-vault')({
+  apiVersion: 'v1',                        // API version (default: 'v1')
+  endpoint: 'http://127.0.0.1:8200',      // Vault server URL (default: 'http://127.0.0.1:8200')
+  token: 'MY_TOKEN',                       // Vault token for authentication
+  pathPrefix: '',                          // Optional prefix for all request paths
+  namespace: 'my-namespace',               // Vault Enterprise namespace
+  noCustomHTTPVerbs: false,                // Use GET with ?list=1 instead of LIST HTTP method
+  requestOptions: {},                      // Custom axios request options applied to all requests
+});
+```
+
+### Environment Variables
+
+The client reads the following environment variables as defaults:
+
+| Variable | Description |
+| --- | --- |
+| `VAULT_ADDR` | Vault server URL (overridden by `endpoint` option) |
+| `VAULT_TOKEN` | Vault token (overridden by `token` option) |
+| `VAULT_NAMESPACE` | Vault Enterprise namespace (overridden by `namespace` option) |
+| `VAULT_PREFIX` | Request path prefix (overridden by `pathPrefix` option) |
+| `VAULT_SKIP_VERIFY` | When set, disables SSL certificate verification |
+
+
 ## Usage
 
 ### Init and unseal
 
 ```javascript
-var options = {
-  apiVersion: 'v1', // default
-  endpoint: 'http://127.0.0.1:8200', // default
-  token: 'MY_TOKEN' // optional client token; can be fetched after valid initialization of the server
-};
-
-// get new instance of the client
-var vault = require("node-vault")(options);
+const vault = require('node-vault')({
+  apiVersion: 'v1',
+  endpoint: 'http://127.0.0.1:8200',
+  token: 'MY_TOKEN', // optional; can be set after initialization
+});
 
 // init vault server
 vault.init({ secret_shares: 1, secret_threshold: 1 })
-.then( (result) => {
-  var keys = result.keys;
-  // set token for all following requests
-  vault.token = result.root_token;
-  // unseal vault server
-  return vault.unseal({ secret_shares: 1, key: keys[0] })
-})
-.catch(console.error);
+  .then((result) => {
+    const keys = result.keys;
+    // set token for all following requests
+    vault.token = result.root_token;
+    // unseal vault server
+    return vault.unseal({ secret_shares: 1, key: keys[0] });
+  })
+  .catch(console.error);
 ```
 
-### Write, read and delete secrets
+### Write, read, update and delete secrets
 
 ```javascript
 vault.write('secret/hello', { value: 'world', lease: '1s' })
-.then( () => vault.read('secret/hello'))
-.then( () => vault.delete('secret/hello'))
-.catch(console.error);
+  .then(() => vault.read('secret/hello'))
+  .then(() => vault.delete('secret/hello'))
+  .catch(console.error);
+```
+
+The `update` method sends a `PATCH` request with `application/merge-patch+json` content type:
+
+```javascript
+vault.update('secret/data/hello', { data: { value: 'new-world' } })
+  .catch(console.error);
 ```
+
+### List secrets
+
+```javascript
+vault.list('secret/metadata/')
+  .then((result) => console.log(result.data.keys))
+  .catch(console.error);
+```
+
 ### Kubernetes Auth Example
+
 ```javascript
+const fs = require('fs');
 
-//if vault kubernets endpoint is /auth/example-cluster/login and role is example-role
-//read token from default token mount path
-const token = await fs.readFileSync('/var/run/secrets/kubernetes.io/serviceaccount/token', { encoding: 'utf8' });
-vault.kubernetesLogin({role: 'example-role' ,
-            jwt: token,
-            kubernetesPath: 'example-cluster'})
+// Read service account token from default mount path
+const jwt = fs.readFileSync('/var/run/secrets/kubernetes.io/serviceaccount/token', { encoding: 'utf8' });
+
+// If the Vault Kubernetes auth endpoint is /auth/example-cluster/login and the role is example-role
+vault.kubernetesLogin({
+  role: 'example-role',
+  jwt: jwt,
+  mount_point: 'example-cluster',
+}).catch(console.error);
+```
+
+### AppRole Auth Example
+
+```javascript
+const vault = require('node-vault')();
+
+vault.approleLogin({
+  role_id: 'my-role-id',
+  secret_id: 'my-secret-id',
+})
+  .then((result) => {
+    // client token is automatically set on successful login
+    console.log(result.auth.client_token);
+  })
+  .catch(console.error);
 ```
 
+### Error Handling
+
+The client exposes two error types accessible from the module:
+
+- **`VaultError`** — Base error class for all vault-related errors.
+- **`ApiResponseError`** — Thrown on non-200/204 responses. Contains a `response` property with `statusCode` and `body`.
+
+```javascript
+vault.read('secret/missing')
+  .catch((err) => {
+    console.error(err.message);       // Error message from Vault
+    if (err.response) {
+      console.error(err.response.statusCode); // e.g. 404
+      console.error(err.response.body);       // Response body from Vault
+    }
+  });
+```
+
+### Custom Commands
+
+You can register custom API commands using `generateFunction`:
+
+```javascript
+vault.generateFunction('myCustomEndpoint', {
+  method: 'GET',
+  path: '/my-custom/endpoint/{{id}}',
+});
+
+// Use the generated function
+vault.myCustomEndpoint({ id: 'abc123' })
+  .then(console.log)
+  .catch(console.error);
+```
+
+
 ## Docs
-Just generate [docco] docs via `npm run docs`.
+Generate [docco] docs via:
+```bash
+npm run docs
+```
 
 
 ## Examples
-Please have a look at the [examples] and the generated [feature list] to see what is already implemented.
+Please have a look at the [examples] and the generated [feature list] to see all supported Vault API endpoints.
 
-Instead of installing all the dependencies like vault itself, postgres and other stuff you can
-use [docker] and [docker-compose] to link and run multiple docker containers with all of its dependencies.
+Instead of installing all the dependencies like vault itself and postgres, you can
+use [docker] and [docker-compose] to link and run multiple docker containers with all of their dependencies.
 
 ```bash
 git clone git@github.com:nodevault/node-vault.git
@@ -97,8 +200,8 @@ First of all you should initialize and unseal the vault:
 ```bash
 node example/init.js
 ```
-You should see `root_token: ` followed by a long key in the response.
-Please copy that long key and export it as environment variable:
+You should see `root_token:` followed by a long key in the response.
+Please copy that long key and export it as an environment variable:
 ```bash
 export VAULT_TOKEN=<insert long key here>
 ```
@@ -108,24 +211,25 @@ Now you are able to run all of the other [examples]:
 node example/policies.js
 ```
 
-## Connecting to vault through a bastion host
+## Connecting to Vault Through a Bastion Host
 
-To connect to a vault server in a private network with a bastion host, you'll need to first open a connection:
+To connect to a vault server in a private network through a bastion host, first open a SOCKS proxy connection:
 ```bash
-ssh -D <socks4Port> bastion.example.com
+ssh -D <socksPort> bastion.example.com
 ```
 
+Then configure the client with a SOCKS proxy agent:
 ```javascript
-const SocksProxyAgent = require('socks-proxy-agent');
-const agent = new SocksProxyAgent(`socks://127.0.0.1:${socks4Port}`, true);
-const options = {
+const { SocksProxyAgent } = require('socks-proxy-agent');
+const agent = new SocksProxyAgent(`socks://127.0.0.1:${socksPort}`);
+
+const vault = require('node-vault')({
   apiVersion: 'v1',
   requestOptions: {
-    agent,
+    httpsAgent: agent,
+    httpAgent: agent,
   },
-};
-
-const vault = require('node-vault')(options);
+});
 ```
 
 ## Custom SSL/TLS Configuration
@@ -169,8 +273,7 @@ See [example/pass_request_options.js](example/pass_request_options.js) for more
 [examples]: https://github.com/nodevault/node-vault/tree/master/example
 [docker-compose.yml]: https://github.com/nodevault/node-vault/tree/master/docker-compose.yml
 [Vault]: https://vaultproject.io/
-[docker-compose]: https://www.docker.com/docker-compose
-[docker]: http://docs.docker.com/
-[docker toolbox]: https://www.docker.com/toolbox
+[docker-compose]: https://docs.docker.com/compose/
+[docker]: https://docs.docker.com/
 [docco]: http://jashkenas.github.io/docco
 [feature list]: https://github.com/nodevault/node-vault/tree/master/features.md