diff --git a/src/auth/blossom.rs b/src/auth/blossom.rs
index df09014..8025f14 100644
--- a/src/auth/blossom.rs
+++ b/src/auth/blossom.rs
@@ -1,6 +1,6 @@
 use base64::prelude::*;
 use log::info;
-use nostr::{Event, JsonUtil, Kind, Tag, TagKind, Timestamp};
+use nostr::{Event, JsonUtil, Kind, TagKind, Timestamp};
 use rocket::http::Status;
 use rocket::request::{FromRequest, Outcome};
 use rocket::{async_trait, Request};
@@ -17,7 +17,7 @@ impl<'r> FromRequest<'r> for BlossomAuth {
     async fn from_request(request: &'r Request<'_>) -> Outcome<Self, Self::Error> {
         if let Some(auth) = request.headers().get_one("authorization") {
             if auth.starts_with("Nostr ") {
-                let event = if let Ok(j) = BASE64_STANDARD.decode(auth[6..].to_string()) {
+                let event = if let Ok(j) = BASE64_STANDARD.decode(&auth[6..]) {
                     if let Ok(ev) = Event::from_json(j) {
                         ev
                     } else {
@@ -51,7 +51,7 @@ impl<'r> FromRequest<'r> for BlossomAuth {
                     return Outcome::Error((Status::new(401), "Missing expiration tag"));
                 }
 
-                if let Err(_) = event.verify() {
+                if event.verify().is_err() {
                     return Outcome::Error((Status::new(401), "Event signature invalid"));
                 }
 
diff --git a/src/auth/nip98.rs b/src/auth/nip98.rs
index 837a41e..46062e4 100644
--- a/src/auth/nip98.rs
+++ b/src/auth/nip98.rs
@@ -20,7 +20,7 @@ impl<'r> FromRequest<'r> for Nip98Auth {
     async fn from_request(request: &'r Request<'_>) -> Outcome<Self, Self::Error> {
         return if let Some(auth) = request.headers().get_one("authorization") {
             if auth.starts_with("Nostr ") {
-                let event = if let Ok(j) = BASE64_STANDARD.decode(auth[6..].to_string()) {
+                let event = if let Ok(j) = BASE64_STANDARD.decode(&auth[6..]) {
                     if let Ok(ev) = Event::from_json(j) {
                         ev
                     } else {
diff --git a/src/processing/webp.rs b/src/processing/webp.rs
index 5c46051..54ccf98 100644
--- a/src/processing/webp.rs
+++ b/src/processing/webp.rs
@@ -50,7 +50,7 @@ impl WebpProcessor {
         av_packet_rescale_ts(pkt, (*in_stream).time_base, (*out_stream).time_base);
 
         let dec_ctx = self.decoders.get_mut(&idx).expect("Missing decoder config");
-        let enc_ctx = self.encoders.get_mut(&out_idx).expect("Missing encoder config");
+        let enc_ctx = self.encoders.get_mut(out_idx).expect("Missing encoder config");
 
         let ret = avcodec_send_packet(*dec_ctx, pkt);
         if ret < 0 {
@@ -67,7 +67,7 @@ impl WebpProcessor {
                 return Err(Error::msg("Frame read error"));
             }
 
-            let frame_out = match self.scalers.get_mut(&out_idx) {
+            let frame_out = match self.scalers.get_mut(out_idx) {
                 Some(sws) => {
                     av_frame_copy_props(frame_out, frame);
                     let ret = sws_scale_frame(*sws, frame_out, frame);
diff --git a/src/routes/blossom.rs b/src/routes/blossom.rs
index 0e5e893..754cc5a 100644
--- a/src/routes/blossom.rs
+++ b/src/routes/blossom.rs
@@ -2,7 +2,7 @@ use std::fs;
 
 use log::error;
 use nostr::prelude::hex;
-use nostr::{Tag, TagKind};
+use nostr::TagKind;
 use rocket::data::ByteUnit;
 use rocket::http::Status;
 use rocket::response::Responder;