diff --git a/is-html-fast/src/main.rs b/is-html-fast/src/main.rs
index 24e53d0..10342ea 100644
--- a/is-html-fast/src/main.rs
+++ b/is-html-fast/src/main.rs
@@ -6,7 +6,7 @@ use std::sync::atomic::{AtomicUsize, Ordering};
 
 use rayon::prelude::*;
 use reqwest::blocking::Client;
-use reqwest::header::CONTENT_TYPE;
+use reqwest::header::{CONTENT_TYPE, USER_AGENT};
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let input_file = File::open("domains.txt")?;
@@ -27,6 +27,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let client = Arc::new(
         Client::builder()
             .timeout(Duration::from_secs(5))
+            .user_agent("Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.0")
             .build()?,
     );