diff --git a/Cargo.toml b/Cargo.toml
index 95862ed..1d2717e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -35,4 +35,4 @@ hdrhistogram = "7.5.2"
 quickcheck = "1.0.3"
 regex = "1.8.1"
 tempfile = "3.5.0"
-chrono = "0.4.24"
+chrono = "0.4.31"
diff --git a/examples/bench.rs b/examples/bench.rs
index c415d0a..7383b15 100644
--- a/examples/bench.rs
+++ b/examples/bench.rs
@@ -42,7 +42,9 @@ fn main() {
 }
 
 pub fn precise_time_ns() -> u64 {
-    chrono::offset::Utc::now().timestamp_nanos() as u64
+    chrono::offset::Utc::now()
+        .timestamp_nanos_opt()
+        .expect("timestamp after year 2262") as u64
 }
 
 fn format_duration(n: u64) -> String {
diff --git a/src/mmap_view_sync.rs b/src/mmap_view_sync.rs
index 60982d9..26cc9a5 100644
--- a/src/mmap_view_sync.rs
+++ b/src/mmap_view_sync.rs
@@ -147,6 +147,7 @@ impl From<MmapMut> for MmapViewSync {
     fn from(mmap: MmapMut) -> MmapViewSync {
         let len = mmap.len();
         MmapViewSync {
+            #[allow(clippy::arc_with_non_send_sync)]
             inner: Arc::new(UnsafeCell::new(mmap)),
             offset: 0,
             len,