diff --git a/Cargo.toml b/Cargo.toml
index fe04cd9..49a7ea0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,10 +1,10 @@
 [package]
 
 name = "tst"
-version = "0.11.0"
+version = "0.12.0"
 
 authors = ["Alexey Pervushin <pervushinai@gmail.com>"]
-edition = "2021"
+edition = "2024"
 readme = "README.md"
 license = "MIT"
 description = "Ternary search trie collection in rust with similar API to std::collections as it possible"
@@ -20,3 +20,8 @@ libc = "0.2.*"
 rand = "0.6.*"
 jemallocator = "0.1.*"
 jemalloc-sys = "0.1.*"
+criterion = "0.6"
+
+[[bench]]
+name = "bench"
+harness = false
diff --git a/benches/bench.rs b/benches/bench.rs
index d17b0fe..9bc99e9 100644
--- a/benches/bench.rs
+++ b/benches/bench.rs
@@ -1,10 +1,5 @@
-#![cfg(test)]
-#![feature(test)]
-extern crate test;
-
-extern crate tst;
-use self::tst::TSTMap;
-use self::test::Bencher;
+use criterion::{criterion_group, criterion_main, Criterion};
+use tst::TSTMap;
 use std::str;
 
 fn prepare() -> TSTMap<i32> {
@@ -24,49 +19,76 @@ fn prepare() -> TSTMap<i32> {
     m
 }
 
-#[bench]
-fn insert_same(b: &mut Bencher) {
-    let mut m = prepare();
-
-    let mut k = 100;
-    b.iter(|| {
-        m.insert("abcabcabca", k);
-        k += 1;
+fn insert_same(c: &mut Criterion) {
+    c.bench_function("insert_same", |b| {
+        b.iter_with_setup(
+            || {
+                let m = prepare();
+                let k = 100;
+                (m, k)
+            },
+            |(mut m, mut k)| {
+                m.insert("abcabcabca", k);
+                k += 1;
+                std::hint::black_box((m, k))
+            }
+        );
     });
 }
 
-#[bench]
-fn get_same(b: &mut Bencher) {
-    let m = prepare();
-
-    b.iter(|| {
-        m.get("abcabcabca");
+fn get_same(c: &mut Criterion) {
+    c.bench_function("get_same", |b| {
+        b.iter_with_setup(
+            || prepare(),
+            |m| {
+                std::hint::black_box(m.get("abcabcabca"));
+            }
+        );
     });
 }
 
-#[bench]
-fn remove_same(b: &mut Bencher) {
-    let mut m = prepare();
-
-    b.iter(|| {
-        m.remove("abcabcabca");
+fn remove_same(c: &mut Criterion) {
+    c.bench_function("remove_same", |b| {
+        b.iter_with_setup(
+            || prepare(),
+            |mut m| {
+                std::hint::black_box(m.remove("abcabcabca"));
+            }
+        );
     });
 }
 
-#[bench]
-fn get_none(b: &mut Bencher) {
-    let m = prepare();
-    b.iter(|| {
-        m.get("abcabcabcad");
+fn get_none(c: &mut Criterion) {
+    c.bench_function("get_none", |b| {
+        b.iter_with_setup(
+            || prepare(),
+            |m| {
+                std::hint::black_box(m.get("abcabcabcad"));
+            }
+        );
     });
 }
 
-#[bench]
-fn iterate(b: &mut Bencher) {
-    let m = prepare();
-    b.iter(|| {
-        for x in m.iter() {
-            test::black_box(x);
-        }
+fn iterate(c: &mut Criterion) {
+    c.bench_function("iterate", |b| {
+        b.iter_with_setup(
+            || prepare(),
+            |m| {
+                for x in m.iter() {
+                    std::hint::black_box(x);
+                }
+            }
+        );
     });
 }
+
+criterion_group!(
+    benches,
+    insert_same,
+    get_same,
+    remove_same,
+    get_none,
+    iterate
+);
+
+criterion_main!(benches);
diff --git a/examples/dict.rs b/examples/dict.rs
index 2731fc0..1328d4e 100644
--- a/examples/dict.rs
+++ b/examples/dict.rs
@@ -5,7 +5,7 @@ static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;
 
 extern crate libc;
 //extern {fn __rjem_je_stats_print (write_cb: extern fn (*const libc::c_void, *const libc::c_char), cbopaque: *const libc::c_void, opts: *const libc::c_char);}
-extern fn write_cb (_: *mut libc::c_void, message: *const libc::c_char) {
+extern "C" fn write_cb (_: *mut libc::c_void, message: *const libc::c_char) {
     print! ("{}", String::from_utf8_lossy (unsafe {std::ffi::CStr::from_ptr (message as *const i8) .to_bytes()}));}
 extern crate jemalloc_sys;
 
diff --git a/src/lib.rs b/src/lib.rs
index a68d41b..e2f3fc8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -24,8 +24,8 @@ macro_rules! tstmap {
         $crate::TSTMap::new()
     }};
     // trailing comma case
-    ($($key:expr => $value:expr,)+) => (tstmap!($($key => $value),+));
-    ($( $key: expr => $val: expr ),*) => {{
+    ($($key:expr_2021 => $value:expr_2021,)+) => (tstmap!($($key => $value),+));
+    ($( $key: expr_2021 => $val: expr_2021 ),*) => {{
         let mut m = $crate::TSTMap::new();
         $(
             m.insert($key, $val);
@@ -60,8 +60,8 @@ macro_rules! tstset {
         $crate::TSTSet::new()
     }};
     // trailing comma case
-    ($($key:expr,)+) => (tstset!($($key),+));
-    ($($key: expr),*) => {{
+    ($($key:expr_2021,)+) => (tstset!($($key),+));
+    ($($key: expr_2021),*) => {{
         let mut s = $crate::TSTSet::new();
         $(
             s.insert($key);
diff --git a/src/map.rs b/src/map.rs
index 0846eba..2a8f154 100644
--- a/src/map.rs
+++ b/src/map.rs
@@ -516,7 +516,7 @@ impl<Value> Drop for TSTMap<Value> {
     fn drop(&mut self) {
         let root = self.root.take();
         let mut iter = DropTraverse::new(root);
-        for _ in iter.next() { }
+        while let Some(_) = iter.next() { }
     }
 }