diff --git a/src/backend/decrypt.rs b/src/backend/decrypt.rs
index 364a20d..5d542b0 100644
--- a/src/backend/decrypt.rs
+++ b/src/backend/decrypt.rs
@@ -18,9 +18,9 @@ pub trait DecryptReadBackend: ReadBackend {
 
     fn read_encrypted_full(&self, tpe: FileType, id: &Id) -> Result<Bytes> {
         let decrypted = self.decrypt(&self.read_full(tpe, id)?)?;
-        Ok(match decrypted[0] {
-            b'{' | b'[' => decrypted,          // not compressed
-            2 => decode_all(&decrypted[1..])?, // 2 indicates compressed data following
+        Ok(match decrypted.first() {
+            Some(b'{' | b'[') => decrypted,          // not compressed
+            Some(2) => decode_all(&decrypted[1..])?, // 2 indicates compressed data following
             _ => bail!("not supported"),
         }
         .into())
diff --git a/src/chunker.rs b/src/chunker.rs
index 94588e8..59d79c3 100644
--- a/src/chunker.rs
+++ b/src/chunker.rs
@@ -81,7 +81,7 @@ impl<R: Read + Send> Iterator for ChunkIter<R> {
         }
 
         self.rabin
-            .reset_and_prefill_window(&mut vec[vec.len() - 64..vec.len()].iter().cloned());
+            .reset_and_prefill_window(&mut vec[vec.len() - 64..vec.len()].iter().copied());
 
         loop {
             if vec.len() >= self.max_size {
diff --git a/src/commands/forget.rs b/src/commands/forget.rs
index 4840961..64ac941 100644
--- a/src/commands/forget.rs
+++ b/src/commands/forget.rs
@@ -112,10 +112,10 @@ pub(super) fn execute(
                     ("remove", "id argument".to_string())
                 } else {
                     match group_keep.matches(sn, last, iter.peek().is_some(), latest_time) {
-                        None if default_keep => ("keep", "".to_string()),
+                        None if default_keep => ("keep", String::new()),
                         None => {
                             forget_snaps.push(sn.id);
-                            ("remove", "".to_string())
+                            ("remove", String::new())
                         }
                         Some(reason) => ("keep", reason),
                     }
diff --git a/src/commands/snapshots.rs b/src/commands/snapshots.rs
index 80d5a06..1ec5ef9 100644
--- a/src/commands/snapshots.rs
+++ b/src/commands/snapshots.rs
@@ -170,7 +170,7 @@ fn display_snap(sn: SnapshotFile) {
     };
     add_entry("Parent", parent);
     if let Some(summary) = sn.summary {
-        add_entry("", "".to_string());
+        add_entry("", String::new());
         add_entry("Command", summary.command);
 
         let source = format!(
@@ -180,7 +180,7 @@ fn display_snap(sn: SnapshotFile) {
             bytes(summary.total_bytes_processed)
         );
         add_entry("Source", source);
-        add_entry("", "".to_string());
+        add_entry("", String::new());
 
         let files = format!(
             "new: {:>10} / changed: {:>10} / unchanged: {:>10}",
@@ -193,7 +193,7 @@ fn display_snap(sn: SnapshotFile) {
             summary.dirs_new, summary.dirs_changed, summary.dirs_unmodified,
         );
         add_entry("Dirs", trees);
-        add_entry("", "".to_string());
+        add_entry("", String::new());
 
         let written = format!(
             "data:  {:>10} blobs / raw: {:>10} / packed: {:>10}\n\