diff --git a/src/async_client.rs b/src/async_client.rs
index 2a5ff067..14e1916b 100644
--- a/src/async_client.rs
+++ b/src/async_client.rs
@@ -193,7 +193,7 @@ impl AsyncClient {
     ) -> Result<Self, Error> {
         let homeserver: Url = match homeserver_url.try_into() {
             Ok(u) => u,
-            Err(e) => panic!("Error parsing homeserver url"),
+            Err(_e) => panic!("Error parsing homeserver url"),
         };
 
         let http_client = reqwest::Client::builder();
diff --git a/src/base_client.rs b/src/base_client.rs
index 37b56d0d..2d5e50ab 100644
--- a/src/base_client.rs
+++ b/src/base_client.rs
@@ -47,10 +47,10 @@ impl Room {
     ///
     /// * `room_id` - The unique id of the room.
     /// * `own_user_id` - The mxid of our own user.
-    pub fn new(room_id: &str, own_user_id: &UserId) -> Self {
+    pub fn new(room_id: &str, own_user_id: &str) -> Self {
         Room {
             room_id: room_id.to_string(),
-            own_user_id: own_user_id.clone(),
+            own_user_id: own_user_id.to_owned(),
             creator: None,
             members: HashMap::new(),
             typing_users: Vec::new(),
@@ -196,7 +196,8 @@ impl Client {
         self.session = Some(session);
     }
 
-    fn get_or_create_room(&mut self, room_id: &RoomId) -> &mut Arc<RwLock<Room>> {
+    fn get_or_create_room(&mut self, room_id: &str) -> &mut Arc<RwLock<Room>> {
+        #[allow(clippy::or_fun_call)]
         self.joined_rooms
             .entry(room_id.to_string())
             .or_insert(Arc::new(RwLock::new(Room::new(
@@ -221,7 +222,7 @@ impl Client {
     /// otherwise.
     pub fn receive_joined_timeline_event(
         &mut self,
-        room_id: &RoomId,
+        room_id: &str,
         event: &EventResult<RoomEvent>,
     ) -> bool {
         match event {
diff --git a/src/error.rs b/src/error.rs
index c97e1c6d..36088ab6 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -18,7 +18,6 @@ impl Display for Error {
         let message = match self.0 {
             InnerError::AuthenticationRequired => "The queried endpoint requires authentication but was called with an anonymous client.",
             InnerError::Reqwest(_) => "An HTTP error occurred.",
-            InnerError::ConfigurationError(_) => "Error configuring the client",
             InnerError::Uri(_) => "Provided string could not be converted into a URI.",
             InnerError::RumaApi(_) => "An error occurred converting between ruma_client_api and hyper types.",
             InnerError::SerdeJson(_) => "A serialization error occurred.",
@@ -36,8 +35,6 @@ impl StdError for Error {}
 pub(crate) enum InnerError {
     /// Queried endpoint requires authentication but was called on an anonymous client.
     AuthenticationRequired,
-    /// An error in the client configuration.
-    ConfigurationError(String),
     /// An error at the HTTP layer.
     Reqwest(ReqwestError),
     /// An error when parsing a string as a URI.
diff --git a/src/lib.rs b/src/lib.rs
index c4a51178..a724ac03 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,5 @@
-//! Crate `nio-client` is a [Matrix](https://matrix.org/) client library.
-//!
-#![warn(missing_docs)]
+//! This crate implements a [Matrix](https://matrix.org/) client library.
+#![deny(missing_docs)]
 
 pub use crate::{error::Error, session::Session};
 pub use reqwest::header::InvalidHeaderValue;