diff --git a/kordophone/src/api/http_client.rs b/kordophone/src/api/http_client.rs
index c500715..06df77f 100644
--- a/kordophone/src/api/http_client.rs
+++ b/kordophone/src/api/http_client.rs
@@ -1,10 +1,10 @@
 extern crate hyper;
 extern crate serde;
 
-use std::{borrow::Cow, default, path::PathBuf, str};
+use std::{path::PathBuf, str};
 use log::{error};
 
-use hyper::{client::ResponseFuture, Body, Client, Method, Request, Uri};
+use hyper::{Body, Client, Method, Request, Uri};
 
 use async_trait::async_trait;
 use serde::{de::DeserializeOwned, Deserialize, Serialize};
@@ -101,8 +101,8 @@ impl APIInterface for HTTPAPIClient {
 impl HTTPAPIClient {
     pub fn new(base_url: Uri, credentials: Option<Credentials>) -> HTTPAPIClient {
         HTTPAPIClient { 
-            base_url: base_url,
-            credentials: credentials,
+            base_url,
+            credentials,
             auth_token: Option::None,
             client: Client::new(),
         }
diff --git a/kordophone/src/model/jwt.rs b/kordophone/src/model/jwt.rs
index 6810c2e..b5b62b9 100644
--- a/kordophone/src/model/jwt.rs
+++ b/kordophone/src/model/jwt.rs
@@ -64,8 +64,8 @@ impl JwtToken {
             exp.parse().unwrap()
         });
 
-        let timestamp = chrono::NaiveDateTime::from_timestamp_opt(exp, 0).unwrap();
-        let expiration_date = DateTime::<Utc>::from_utc(timestamp, Utc);
+        let timestamp = DateTime::from_timestamp(exp, 0).unwrap().naive_utc();
+        let expiration_date = DateTime::from_naive_utc_and_offset(timestamp, Utc);
 
         Ok(JwtToken {
             header,
diff --git a/kordophone/src/tests/test_client.rs b/kordophone/src/tests/test_client.rs
index 455dff8..375a449 100644
--- a/kordophone/src/tests/test_client.rs
+++ b/kordophone/src/tests/test_client.rs
@@ -24,7 +24,7 @@ impl TestClient {
 impl APIInterface for TestClient {
     type Error = TestError;
 
-    async fn authenticate(&mut self, credentials: Credentials) -> Result<JwtToken, Self::Error> {
+    async fn authenticate(&mut self, _credentials: Credentials) -> Result<JwtToken, Self::Error> {
         Ok(JwtToken::dummy())
     }