diff --git a/Cargo.toml b/Cargo.toml
index d96a0c0..99aa901 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "duration-str"
-version = "0.11.0"
+version = "0.11.1"
 authors = ["baoyachi <liaoymxsdl@gmail.com>"]
 edition = "2021"
 description = "duration string parser"
diff --git a/benches/parser_benchmark.rs b/benches/parser_benchmark.rs
index 77cfe03..ab4dd85 100644
--- a/benches/parser_benchmark.rs
+++ b/benches/parser_benchmark.rs
@@ -12,16 +12,18 @@ fn parse_duration() {
 
 fn impeccable_duration() {
     let input = "2h 37m";
-    (
-        digit1::<_, ContextError>.try_map(str::parse::<usize>),
+    let duration = (
+        digit1::<_, ContextError>.try_map(str::parse::<u64>),
         literal('h').value(3600),
         multispace0,
-        digit1.try_map(str::parse::<usize>),
+        digit1.try_map(str::parse::<u64>),
         literal('m').value(60),
     )
         .map(|(hour, h_unit, _, min, min_unit)| hour * h_unit + min * min_unit)
+        .map(|seconds| Duration::new(seconds, 0))
         .parse(input)
         .unwrap();
+    assert_eq!(duration, Duration::new(9420, 0))
 }
 
 pub fn duration_str_benchmark(c: &mut Criterion) {