diff --git a/.drone.yml b/.drone.yml
index e1e28d4..0dffff4 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -19,11 +19,16 @@ steps:
       - cargo check --all --all-targets
 
   - name: cargo clippy
-    image: rust:1.61-bullseye
+    image: rust:1.65-bullseye
     commands:
       - rustup component add clippy
-      - cargo clippy --workspace --tests --all-targets --all-features -- -D warnings -D deprecated -D clippy::perf -D clippy::complexity -D clippy::dbg_macro
-      - cargo clippy --workspace -- -D clippy::unwrap_used
+      - cargo clippy --workspace --tests --all-targets --all-features --
+        -D warnings -D deprecated -D clippy::perf -D clippy::complexity
+        -D clippy::dbg_macro -D clippy::inefficient_to_string
+        -D clippy::items-after-statements -D clippy::implicit_clone
+        -D clippy::wildcard_imports -D clippy::cast_lossless
+        -D clippy::manual_string_new -D clippy::redundant_closure_for_method_calls
+      - cargo clippy --workspace --all-features -- -D clippy::unwrap_used
 
   - name: cargo test
     image: rust:1.61-bullseye
diff --git a/Cargo.lock b/Cargo.lock
index 5343ae8..668616f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,7 +4,7 @@ version = 3
 
 [[package]]
 name = "activitypub_federation"
-version = "0.3.3"
+version = "0.3.4"
 dependencies = [
  "activitystreams-kinds",
  "actix-rt",
diff --git a/examples/federation/lib.rs b/examples/federation/lib.rs
deleted file mode 100644
index 87c421e..0000000
--- a/examples/federation/lib.rs
+++ /dev/null
@@ -1,13 +0,0 @@
-use rand::{distributions::Alphanumeric, thread_rng, Rng};
-use url::{ParseError, Url};
-
-/// Just generate random url as object id. In a real project, you probably want to use
-/// an url which contains the database id for easy retrieval (or store the random id in db).
-pub fn generate_object_id(hostname: &str) -> Result<Url, ParseError> {
-    let id: String = thread_rng()
-        .sample_iter(&Alphanumeric)
-        .take(7)
-        .map(char::from)
-        .collect();
-    Url::parse(&format!("http://{}/objects/{}", hostname, id))
-}
diff --git a/examples/federation/main.rs b/examples/federation/main.rs
index 4e5f0f0..2c4964c 100644
--- a/examples/federation/main.rs
+++ b/examples/federation/main.rs
@@ -1,10 +1,10 @@
-use crate::{error::Error, instance::Instance, lib::generate_object_id, objects::note::MyPost};
+use crate::{error::Error, instance::Instance, utils::generate_object_id, objects::note::MyPost};
 use tracing::log::LevelFilter;
 
 mod activities;
 mod error;
 mod instance;
-mod lib;
+mod utils;
 mod objects;
 
 #[actix_rt::main]
diff --git a/examples/federation/objects/person.rs b/examples/federation/objects/person.rs
index 3213d68..af92c53 100644
--- a/examples/federation/objects/person.rs
+++ b/examples/federation/objects/person.rs
@@ -2,7 +2,7 @@ use crate::{
     activities::{accept::Accept, create_note::CreateNote, follow::Follow},
     error::Error,
     instance::InstanceHandle,
-    lib::generate_object_id,
+    utils::generate_object_id,
     objects::note::MyPost,
 };
 use activitypub_federation::{
diff --git a/src/core/activity_queue.rs b/src/core/activity_queue.rs
index 698f561..9a9e292 100644
--- a/src/core/activity_queue.rs
+++ b/src/core/activity_queue.rs
@@ -144,7 +144,7 @@ async fn do_send(
         request_builder,
         task.activity.clone(),
         task.public_key.clone(),
-        task.private_key.to_owned(),
+        task.private_key.clone(),
         task.http_signature_compat,
     )
     .await?;