diff --git a/src/api/client_server/unversioned.rs b/src/api/client_server/unversioned.rs
index f1b35a20..e092eb05 100644
--- a/src/api/client_server/unversioned.rs
+++ b/src/api/client_server/unversioned.rs
@@ -1,4 +1,4 @@
-use std::{collections::BTreeMap, iter::FromIterator};
+use std::collections::BTreeMap;
 
 use axum::{response::IntoResponse, Json};
 use ruma::api::client::{discovery::get_supported_versions, error::ErrorKind};
diff --git a/src/api/ruma_wrapper/axum.rs b/src/api/ruma_wrapper/axum.rs
index fda13531..57348a73 100644
--- a/src/api/ruma_wrapper/axum.rs
+++ b/src/api/ruma_wrapper/axum.rs
@@ -1,4 +1,4 @@
-use std::{collections::BTreeMap, iter::FromIterator, str};
+use std::{collections::BTreeMap, str};
 
 use axum::{
     async_trait,
diff --git a/src/database/abstraction.rs b/src/database/abstraction.rs
index 5056de8f..44e24968 100644
--- a/src/database/abstraction.rs
+++ b/src/database/abstraction.rs
@@ -24,6 +24,8 @@ pub(crate) trait KeyValueDatabaseEngine: Send + Sync {
     fn memory_usage(&self) -> Result<String> {
         Ok("Current database engine does not support memory usage reporting.".to_owned())
     }
+
+    #[allow(dead_code)]
     fn clear_caches(&self) {}
 }
 
diff --git a/src/database/abstraction/rocksdb.rs b/src/database/abstraction/rocksdb.rs
index 9dc565c7..dce30c91 100644
--- a/src/database/abstraction/rocksdb.rs
+++ b/src/database/abstraction/rocksdb.rs
@@ -164,6 +164,8 @@ impl KeyValueDatabaseEngine for Arc<Engine> {
         ))
     }
 
+    // TODO: figure out if this is needed for rocksdb
+    #[allow(dead_code)]
     fn clear_caches(&self) {}
 }
 
diff --git a/src/service/admin/mod.rs b/src/service/admin/mod.rs
index 10184a35..4b9e4c54 100644
--- a/src/service/admin/mod.rs
+++ b/src/service/admin/mod.rs
@@ -1,6 +1,5 @@
 use std::{
     collections::BTreeMap,
-    convert::{TryFrom, TryInto},
     sync::{Arc, RwLock},
     time::Instant,
 };
diff --git a/src/service/rooms/event_handler/mod.rs b/src/service/rooms/event_handler/mod.rs
index d34424be..0c83ee45 100644
--- a/src/service/rooms/event_handler/mod.rs
+++ b/src/service/rooms/event_handler/mod.rs
@@ -7,9 +7,9 @@ use ruma::{
     RoomVersionId,
 };
 use std::{
-    collections::{hash_map, BTreeMap, HashMap, HashSet},
+    collections::{hash_map, HashSet},
     pin::Pin,
-    sync::{Arc, RwLock, RwLockWriteGuard},
+    sync::RwLockWriteGuard,
     time::{Duration, Instant, SystemTime},
 };
 use tokio::sync::Semaphore;
@@ -36,7 +36,7 @@ use ruma::{
 use serde_json::value::RawValue as RawJsonValue;
 use tracing::{debug, error, info, trace, warn};
 
-use crate::{service::*, services, Error, PduEvent, Result};
+use crate::{service::*, services, Error, PduEvent};
 
 use super::state_compressor::CompressedStateEvent;