diff --git a/README.md b/README.md
index 0559ab0..9129abc 100644
--- a/README.md
+++ b/README.md
@@ -748,6 +748,7 @@ This method can be used to solve Altcha captcha. Returns a token.
 solver.altcha({
     pageurl: "https://mysite.com/page/with/altcha",
     challenge_url: "https://example/altcha",
+    challenge_json: '{"algorithm":"SHA-256","challenge":"a4c9d8e7f1b23a6c...",..."signature":"7b3e2a9d5c8f1046e2d91c3a..."}'
 })
 .then((res) => {
 console.log(res);
diff --git a/examples/altcha.js b/examples/altcha.js
index 13e5b55..d07c09e 100644
--- a/examples/altcha.js
+++ b/examples/altcha.js
@@ -6,11 +6,11 @@ const solver = new TwoCaptcha.Solver(APIKEY);
 solver.altcha({
     pageurl: "https://mysite.com/page/with/altcha",
     challenge_url: "https://example/altcha",
-    // challenge_json: '{"algorithm":"SHA-256","challenge":"a4c9d8e7f1b23a6c...",..."signature":"7b3e2a9d5c8f1046e2d91c3a..."}'
+    challenge_json: '{"algorithm":"SHA-256","challenge":"a4c9d8e7f1b23a6c...",..."signature":"7b3e2a9d5c8f1046e2d91c3a..."}'
 })
 .then((res) => {
     console.log(res);
 })
 .catch((err) => {
     console.log(err);
-})
\ No newline at end of file
+})
diff --git a/src/structs/2captcha.ts b/src/structs/2captcha.ts
index 41d36e0..33dd4ee 100644
--- a/src/structs/2captcha.ts
+++ b/src/structs/2captcha.ts
@@ -2160,8 +2160,8 @@ public async temu(params: paramsTemu): Promise<CaptchaAnswer> {
  * 
  * @param {{ pageurl, challenge_url, challenge_json, proxy, proxytype}} params Parameters Altcha as an object.
  * @param {string} params.pageurl Full URL of the page where you solve the captcha.
- * @param {string} params.challenge_url The value of the 'challenge_url' parameter for the 'altcha-widget' element containing the captcha on the page. You can send either challenge_url or challenge_json parameter, but not two of it simultaneously.
- * @param {string} params.challenge_json The contents of the file from the 'challenge_url' parameter. You can send either challenge_url or challenge_json parameter, but not two of it simultaneously.
+ * @param {string} params.challenge_url The value of the 'challenge_url' parameter for the 'altcha-widget' element containing the captcha on the page.
+ * @param {string} params.challenge_json The contents of the file from the 'challenge_url' parameter.
  * @param {string} params.proxy Format: `login:password@123.123.123.123:3128` You can find more info about proxies [here](https://2captcha.com/2captcha-api#proxies).
  * @param {string} params.proxytype Type of your proxy: `HTTP`, `HTTPS`, `SOCKS4`, `SOCKS5`.
  * 
@@ -2169,6 +2169,7 @@ public async temu(params: paramsTemu): Promise<CaptchaAnswer> {
  * solver.altcha({
  *     pageurl: "https://mysite.com/page/with/altcha",
  *     challenge_url: "https://example/altcha",
+ *     challenge_json: '{"algorithm":"SHA-256","challenge":"a4c9d8e7f1b23a6c...",..."signature":"7b3e2a9d5c8f1046e2d91c3a..."}'
  * })
  * .then((res) => {
  *     console.log(res);
diff --git a/src/utils/checkCaptchaParams.ts b/src/utils/checkCaptchaParams.ts
index 8d0cfde..52933b7 100644
--- a/src/utils/checkCaptchaParams.ts
+++ b/src/utils/checkCaptchaParams.ts
@@ -180,23 +180,6 @@ export default function checkCaptchaParams(params: Object, method: string) {
     }
   })
 
-  if(method === "altcha") {
-    const hasChallengeUrl = params.hasOwnProperty('challenge_url')
-    const hasChallengeJson = params.hasOwnProperty('challenge_json')
-
-    if(!hasChallengeUrl && !hasChallengeJson) {
-      isCorrectCaptchaParams = false
-      throw new Error(`Error when check params captcha.\nNot found "challenge_url" or "challenge_json" field in the Object. One of this field is required for "${method}" method. Please add field "challenge_url" or "challenge_json" to captcha parameters.`)
-    }
-
-    if(hasChallengeUrl && hasChallengeJson) {
-      isCorrectCaptchaParams = false
-      throw new Error(`Error when check params captcha.\nYou must provide exactly one of "challenge_url" or "challenge_json" for "${method}" method.`)
-    }
-
-    isCorrectCaptchaParams = true
-  }
-
   //The parameters `textinstructions` and `imginstructions` are mandatory for the methods `bounding_box`, `grid`, and `canvas`.
   if(method === "bounding_box" || method === "grid" || method === "canvas") {
     if(params.hasOwnProperty('textinstructions') || params.hasOwnProperty('imginstructions')) {