diff --git a/lychee-lib/src/checker.rs b/lychee-lib/src/checker.rs
index c920550..9a4d7b9 100644
--- a/lychee-lib/src/checker.rs
+++ b/lychee-lib/src/checker.rs
@@ -8,7 +8,7 @@ use http::StatusCode;
 use reqwest::Request;
 use std::{collections::HashSet, time::Duration};
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub(crate) struct Checker {
     retry_wait_time: Duration,
     max_retries: u64,
diff --git a/lychee-lib/src/client.rs b/lychee-lib/src/client.rs
index cadd7e3..62e32a7 100644
--- a/lychee-lib/src/client.rs
+++ b/lychee-lib/src/client.rs
@@ -36,7 +36,8 @@ use crate::{
     quirks::Quirks,
     remap::Remaps,
     types::uri::github::GithubUri,
-    utils::fragment_checker::FragmentChecker, ErrorKind, Request, Response, Result, Status, Uri,
+    utils::fragment_checker::FragmentChecker,
+    ErrorKind, Request, Response, Result, Status, Uri,
 };
 
 #[cfg(all(feature = "email-check", feature = "native-tls"))]
@@ -465,7 +466,7 @@ impl Client {
     {
         let Request {
             ref mut uri,
-            ref credentials,
+            credentials,
             source,
             ..
         } = request.try_into()?;
@@ -486,7 +487,9 @@ impl Client {
         }
 
         let request_chain: RequestChain = Chain::new(vec![
+            // TODO: insert self.request_chain
             Box::<Quirks>::default(),
+            Box::new(credentials),
             Box::new(Checker::new(
                 self.retry_wait_time,
                 self.max_retries,
diff --git a/lychee-lib/src/types/basic_auth/credentials.rs b/lychee-lib/src/types/basic_auth/credentials.rs
index 2bdf19e..906357f 100644
--- a/lychee-lib/src/types/basic_auth/credentials.rs
+++ b/lychee-lib/src/types/basic_auth/credentials.rs
@@ -75,11 +75,14 @@ impl BasicAuthCredentials {
 }
 
 #[async_trait]
-impl Chainable<Request, Status> for BasicAuthCredentials {
+impl Chainable<Request, Status> for Option<BasicAuthCredentials> {
     async fn chain(&mut self, mut request: Request) -> ChainResult<Request, Status> {
-        request
-            .headers_mut()
-            .append(AUTHORIZATION, self.to_authorization().0.encode());
+        if let Some(credentials) = self {
+            request
+                .headers_mut()
+                .append(AUTHORIZATION, credentials.to_authorization().0.encode());
+        }
+
         ChainResult::Next(request)
     }
 }