diff --git a/src/lib.rs b/src/lib.rs
index cd3f159..0992df5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,11 +4,19 @@
 // SPDX-License-Identifier: MIT
 
 //! # mcaptcha-api-rs: Library to interact with with mCaptcha API
-//! 
+//!
 //! This library provides a convenient interface to validate [mCaptcha authorization
 //! tokens](https://mcaptcha.org/docs/webmasters/terminology#authorization-token) presented by
 //! Visitors against your mCaptcha instances. It uses [reqwest](https://crates.io/crates/reqwest),
 //! and `native-tls` under the hood to communicate with the API.
+//! ```rust,ignore
+//!  use url::Url;
+//!  use mcaptcha_api_rs::MCaptcha;
+//!
+//!  let mcaptcha = MCaptcha::new("sitekeyfromdashboard", "secretfromdashboadr", Url::parse("https://mcaptcha.example.com").unwrap());
+//!  assert!(mcaptcha.verify("authorizationtokenfromvisitor").await.unwrap());
+//!  ```
+
 use reqwest::Client;
 use serde::{Deserialize, Serialize};
 use url::Url;
@@ -26,38 +34,22 @@ impl MCaptcha {
     ///
     /// Parameters:
     /// - [`sitekey`](https://mcaptcha.org/docs/webmasters/terminology#sitekey):  unique identifier of
-    /// captcha configuration. Available on mCaptcha dashboard. 
+    /// captcha configuration. Available on mCaptcha dashboard.
     /// - `account_secret`: used for authentication. Available on the settings page of mCaptcha dashboard
     /// - `instance_url`: the URL of your mCaptcha instance
     ///
-    ///
-    /// ```rust
-    /// use url::Url;
-    /// use mcaptcha_api_rs::MCaptcha;
-    ///
-    /// let mcaptcha = MCaptcha::new("sitekeyfromdashboard", "secretfromdashboadr", Url::parse("https://mcaptcha.example.com").unwrap());
-    /// ```
-    pub fn new(sitekey: String, account_secret: String, instance_url: Url) -> Self {
+    pub fn new<T: Into<String>>(sitekey: T, account_secret: T, instance_url: Url) -> Self {
         let mut verify_path = instance_url.clone();
         verify_path.set_path("/api/v1/pow/siteverify");
         Self {
-            sitekey,
-            account_secret,
+            sitekey: sitekey.into(),
+            account_secret: account_secret.into(),
             verify_path,
             client: Client::new(),
         }
     }
 
     /// Verify authorization token presented by visitor against mCaptcha server
-    ///
-    ///
-    /// ```rust,no_run
-    /// use url::Url;
-    /// use mcaptcha_api_rs::MCaptcha;
-    ///
-    /// let mcaptcha = MCaptcha::new("sitekeyfromdashboard", "secretfromdashboadr", Url::parse("https://mcaptcha.example.com").unwrap());
-    /// assert!(mcaptcha.verify("authorizationtokenfromvisitor").await.unwrap());
-    /// ```
     pub async fn verify(&self, token: &str) -> Result<bool, reqwest::Error> {
         let payload = CaptchaVerfiyPayload::from_ctx(self, token);
         let res: CaptchaVerifyResp = self