diff --git a/Cargo.toml b/Cargo.toml
index bcc8c7b..f06f3c7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@ kamadak-exif = "0.5.0"
 libc = "0.2.68"
 log = "0.4.8"
 mime = "0.3.0"
-r2d2-memcache = "0.5.0"
+r2d2-memcache = "0.6"
 rand = "0.7.0"
 regex = "1.3.6"
 reqwest = { version = "0.10.4", features = ["json"] }
diff --git a/src/adm/precache.rs b/src/adm/precache.rs
index 6d14e5c..8646d38 100644
--- a/src/adm/precache.rs
+++ b/src/adm/precache.rs
@@ -34,7 +34,7 @@ impl Args {
     pub async fn run(&self) -> Result<(), Error> {
         let max_time = Duration::from_secs(self.max_time);
         let timer = Instant::now();
-        let mut cache = Client::connect(self.cache.memcached_url.as_ref())?;
+        let cache = Client::connect(self.cache.memcached_url.as_ref())?;
         let size = SizeTag::Small;
         let (mut n, mut n_stored) = (0, 0);
         let photos = Photo::query(true)
diff --git a/src/server/context.rs b/src/server/context.rs
index 5fde9a8..1e67092 100644
--- a/src/server/context.rs
+++ b/src/server/context.rs
@@ -145,7 +145,7 @@ impl Context {
         R: Future<Output = Result<Vec<u8>, E>>,
     {
         match self.global.cache() {
-            Ok(mut client) => {
+            Ok(client) => {
                 match client.get(key) {
                     Ok(Some(data)) => {
                         debug!("Cache: {} found", key);
@@ -172,7 +172,7 @@ impl Context {
         }
     }
     pub fn clear_cache(&self, key: &str) {
-        if let Ok(mut client) = self.global.cache() {
+        if let Ok(client) = self.global.cache() {
             match client.delete(key) {
                 Ok(flag) => debug!("Cache: deleted {}: {:?}", key, flag),
                 Err(e) => warn!("Cache: Failed to delete {}: {}", key, e),