diff --git a/package.json b/package.json
index 5167c16..74e168e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "2captcha",
-  "version": "4.0.0@next",
+  "version": "4.0.0",
   "description": "An asynchronous wrapper around the 2captcha API.",
   "main": "dist/index.js",
   "repository": "https://github.com/furry/2captcha",
diff --git a/src/structs/solver.ts b/src/structs/solver.ts
index 7dfc739..14a08fd 100644
--- a/src/structs/solver.ts
+++ b/src/structs/solver.ts
@@ -34,6 +34,7 @@ import {
     Task,
     TurnstileDefault,
     TurnstileResult,
+    GeetestV4Result,
 } from "../types.js";
 
 import { toBase64, toQueryString } from "../utils/conversions.js";
@@ -475,6 +476,31 @@ export class Solver {
         return this.registerPollEntry(cid);
     }
 
+
+    /**
+     * Solves a GeeTest v4 captcha
+     * @param pageurl The URL of the page the captcha appears on.
+     * @param proxied Whether to use a user provied proxy to solve this captcha.
+     * @param extra Any extra parameters to send to the solver.
+     * @throws {SolverError}
+     * @returns {Promise<CaptchaResult<GeetestV4Result>>}
+     */
+    public async geetestV4<T extends boolean>(
+        pageurl: string, proxied: T = false as T,
+        extra: T extends false ? GeetestExtrasV4 : GeetestExtrasV4 | ProxiedCaptchaExtras
+    ): Promise<CaptchaResult<GeetestV4Result>> {
+        const cid = await this.newTask({
+            task: {
+                type: proxied ? "GeeTestTask" : "GeeTestTaskProxyless",
+                websiteURL: pageurl,
+                version: 4,
+                ...extra
+            }
+        })
+
+        return this.registerPollEntry(cid);
+    }
+
     /**
      * Solves a GeeTest captcha.
      * @param pageurl URL of the page the captcha appears on.
@@ -485,7 +511,10 @@ export class Solver {
      * @throws {SolverError}
      * @returns {Promise<CaptchaResult<GeetestResult>>}
      */
-    public async geetest(pageurl: string, gt: string, challenge: string, proxied = false, extra: GeetestExtrasV3 | GeetestExtrasV4): Promise<CaptchaResult<GeetestResult>> {
+    public async geetest<T extends boolean>(
+        pageurl: string, gt: string, challenge: string, 
+        proxied: T = false as T,
+        extra: T extends false ?  GeetestExtrasV3 : GeetestExtrasV3 | ProxiedCaptchaExtras): Promise<CaptchaResult<GeetestResult>> {
         const cid = await this.newTask({
             task: {
                 type: proxied ? "GeeTestTask" : "GeeTestTaskProxyless",
diff --git a/src/types.ts b/src/types.ts
index 0355b22..6ea7b83 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -174,7 +174,6 @@ export interface TurnstileExtras {
 }
 
 export interface GeetestExtrasV4 {
-    version: 4
     initParameters?: {
         captcha_id: string
     }
@@ -183,7 +182,6 @@ export interface GeetestExtrasV4 {
 export interface GeetestExtrasV3 {
     geetestApiServerSubdomain: string,
     useragent: string,
-    version: 3
 }