diff --git a/httpntlm.js b/httpntlm.js
index b3bfcf4..d475d13 100644
--- a/httpntlm.js
+++ b/httpntlm.js
@@ -66,7 +66,8 @@ exports.method = function(method, options, finalCallback){
 	function sendType3Message (res, callback) {
 		// catch redirect here:
 		if(res.headers.location) {
-			options.url = res.headers.location;
+			const resolved = new URL(res.headers.location, options.url);
+			options.url = resolved.href;
 			return exports[method](options, finalCallback);
 		}
 
diff --git a/httpntlm.ts b/httpntlm.ts
new file mode 100644
index 0000000..195ca17
--- /dev/null
+++ b/httpntlm.ts
@@ -0,0 +1,209 @@
+// Type definitions for httpntlm
+// Project: https://github.com/SamDecrock/node-http-ntlm
+// Definitions by: DeepAgent
+
+/// <reference types="node" />
+
+declare module 'httpntlm' {
+  import { Agent } from 'http';
+
+  /**
+   * Options for NTLM HTTP requests
+   */
+  export interface HttpntlmOptions {
+    /** The URL to make the request to */
+    url: string;
+    
+    /** Username for NTLM authentication */
+    username: string;
+    
+    /** Password for NTLM authentication */
+    password?: string;
+    
+    /** Workstation name (optional) */
+    workstation?: string;
+    
+    /** Domain name (optional) */
+    domain?: string;
+    
+    /** Pre-computed LM password hash (optional) */
+    lm_password?: Buffer;
+    
+    /** Pre-computed NT password hash (optional) */
+    nt_password?: Buffer;
+    
+    /** Custom HTTP agent (optional) */
+    agent?: Agent;
+    
+    /** Request timeout in milliseconds (optional) */
+    timeout?: number;
+    
+    /** Custom HTTP headers (optional) */
+    headers?: { [key: string]: string };
+    
+    /** Request body (optional) */
+    body?: string | Buffer;
+    
+    /** JSON object to send as request body (optional) */
+    json?: any;
+    
+    /** Form parameters to send (optional) */
+    parameters?: { [key: string]: any };
+    
+    /** Files to upload (optional) */
+    files?: { [key: string]: string | Buffer };
+    
+    /** Whether to return response body as binary Buffer (optional) */
+    binary?: boolean;
+    
+    /** Character encoding for response (optional) */
+    encoding?: string;
+  }
+
+  /**
+   * Response from NTLM HTTP request
+   */
+  export interface HttpntlmResponse {
+    /** Response headers */
+    headers: { [key: string]: string | string[] };
+    
+    /** Response body (string or Buffer depending on options) */
+    body: string | Buffer;
+    
+    /** HTTP status code */
+    statusCode: number;
+    
+    /** Response cookies (optional) */
+    cookies?: string[];
+  }
+
+  /**
+   * Callback function for NTLM HTTP requests
+   */
+  export type HttpntlmCallback = (err: Error | null, response?: HttpntlmResponse) => void;
+
+  /**
+   * Performs an HTTP GET request with NTLM authentication
+   * @param options - Request options
+   * @param callback - Callback function
+   */
+  export function get(options: HttpntlmOptions, callback: HttpntlmCallback): void;
+
+  /**
+   * Performs an HTTP POST request with NTLM authentication
+   * @param options - Request options
+   * @param callback - Callback function
+   */
+  export function post(options: HttpntlmOptions, callback: HttpntlmCallback): void;
+
+  /**
+   * Performs an HTTP PUT request with NTLM authentication
+   * @param options - Request options
+   * @param callback - Callback function
+   */
+  export function put(options: HttpntlmOptions, callback: HttpntlmCallback): void;
+
+  /**
+   * Performs an HTTP PATCH request with NTLM authentication
+   * @param options - Request options
+   * @param callback - Callback function
+   */
+  export function patch(options: HttpntlmOptions, callback: HttpntlmCallback): void;
+
+  /**
+   * Performs an HTTP DELETE request with NTLM authentication
+   * @param options - Request options
+   * @param callback - Callback function
+   */
+  export { del as delete };
+  export function del(options: HttpntlmOptions, callback: HttpntlmCallback): void;
+
+  /**
+   * Performs an HTTP OPTIONS request with NTLM authentication
+   * @param options - Request options
+   * @param callback - Callback function
+   */
+  export function options(options: HttpntlmOptions, callback: HttpntlmCallback): void;
+
+  /**
+   * Performs an HTTP request with specified method and NTLM authentication
+   * @param method - HTTP method (GET, POST, PUT, etc.)
+   * @param options - Request options
+   * @param callback - Callback function
+   */
+  export function method(method: string, options: HttpntlmOptions, callback: HttpntlmCallback): void;
+
+  /**
+   * Type 2 message structure from NTLM handshake
+   */
+  export interface Type2Message {
+    /** NTLM signature */
+    signature: Buffer;
+    
+    /** Message type (should be 2) */
+    type: number;
+    
+    /** Target name */
+    targetName: string;
+    
+    /** Negotiation flags */
+    flags: number;
+    
+    /** Server challenge */
+    challenge: Buffer;
+    
+    /** Target information */
+    targetInfo?: Buffer;
+  }
+
+  /**
+   * Low-level NTLM utilities
+   */
+  export namespace ntlm {
+    /**
+     * Creates NTLM Type 1 message
+     * @param workstation - Workstation name
+     * @param domain - Domain name
+     * @returns Type 1 message buffer
+     */
+    export function createType1Message(workstation?: string, domain?: string): Buffer;
+    
+    /**
+     * Parses NTLM Type 2 message
+     * @param buffer - Type 2 message buffer
+     * @returns Parsed Type 2 message
+     */
+    export function parseType2Message(buffer: Buffer): Type2Message;
+    
+    /**
+     * Creates NTLM Type 3 message
+     * @param type2Message - Parsed Type 2 message
+     * @param username - Username
+     * @param password - Password
+     * @param workstation - Workstation name
+     * @param domain - Domain name
+     * @returns Type 3 message buffer
+     */
+    export function createType3Message(
+      type2Message: Type2Message,
+      username: string,
+      password: string,
+      workstation?: string,
+      domain?: string
+    ): Buffer;
+    
+    /**
+     * Creates NT hashed password
+     * @param password - Plain text password
+     * @returns NT hashed password buffer
+     */
+    export function create_NT_hashed_password(password: string): Buffer;
+    
+    /**
+     * Creates LM hashed password
+     * @param password - Plain text password
+     * @returns LM hashed password buffer
+     */
+    export function create_LM_hashed_password(password: string): Buffer;
+  }
+}
\ No newline at end of file