diff --git a/src/db.rs b/src/db.rs
index 07e9f9d..414504c 100644
--- a/src/db.rs
+++ b/src/db.rs
@@ -239,8 +239,8 @@ impl DBStore {
         self.iter_prefix_cf(self.txid_cf(), prefix)
     }
 
-    fn iter_cf<'a, const N: usize>(
-        &'a self,
+    fn iter_cf<const N: usize>(
+        &self,
         cf: &rocksdb::ColumnFamily,
         readopts: rocksdb::ReadOptions,
         prefix: Option<HashPrefix>,
@@ -385,7 +385,7 @@ impl<'a, const N: usize> DBIterator<'a, N> {
     }
 }
 
-impl<'a, const N: usize> Iterator for DBIterator<'a, N> {
+impl<const N: usize> Iterator for DBIterator<'_, N> {
     type Item = [u8; N];
 
     fn next(&mut self) -> Option<Self::Item> {
diff --git a/src/index.rs b/src/index.rs
index 5a22dc6..758eede 100644
--- a/src/index.rs
+++ b/src/index.rs
@@ -246,7 +246,7 @@ fn index_single_block(
         height: usize,
     }
 
-    impl<'a> Visitor for IndexBlockVisitor<'a> {
+    impl Visitor for IndexBlockVisitor<'_> {
         fn visit_transaction(&mut self, tx: &bsl::Transaction) -> ControlFlow<()> {
             let txid = bsl_txid(tx);
             self.batch
diff --git a/src/status.rs b/src/status.rs
index 41115b3..0282f09 100644
--- a/src/status.rs
+++ b/src/status.rs
@@ -240,7 +240,7 @@ impl ScriptHashStatus {
     fn confirmed_height_entries<'a>(
         &'a self,
         chain: &'a Chain,
-    ) -> impl Iterator<Item = (usize, &[TxEntry])> + 'a {
+    ) -> impl Iterator<Item = (usize, &'a [TxEntry])> + 'a {
         self.confirmed
             .iter()
             .filter_map(move |(blockhash, entries)| {
@@ -252,7 +252,7 @@ impl ScriptHashStatus {
 
     /// Iterate through confirmed TxEntries.
     /// Skip entries from stale blocks.
-    fn confirmed_entries<'a>(&'a self, chain: &'a Chain) -> impl Iterator<Item = &TxEntry> + 'a {
+    fn confirmed_entries<'a>(&'a self, chain: &'a Chain) -> impl Iterator<Item = &'a TxEntry> + 'a {
         self.confirmed_height_entries(chain)
             .flat_map(|(_height, entries)| entries)
     }
@@ -565,7 +565,7 @@ fn filter_block_txs_inputs(
         pos: usize,
     }
 
-    impl<'a> Visitor for FindInputs<'a> {
+    impl Visitor for FindInputs<'_> {
         fn visit_transaction(&mut self, tx: &bsl::Transaction) -> ControlFlow<()> {
             if !self.buffer.is_empty() {
                 let result = std::mem::take(&mut self.buffer);