diff --git a/version-helper/Cargo.toml b/version-helper/Cargo.toml
index 971eb87e..69b0a1d1 100644
--- a/version-helper/Cargo.toml
+++ b/version-helper/Cargo.toml
@@ -13,4 +13,4 @@ edition = "2021"
 rust-version = "1.63"
 
 [dependencies]
-chrono = { version = "0.4.19", default-features = false, features = ["std", "clock"] }
+chrono = { version = "0.4.23", default-features = false, features = ["std", "clock"] }
diff --git a/version-helper/src/lib.rs b/version-helper/src/lib.rs
index ccd90f63..cc7455d7 100644
--- a/version-helper/src/lib.rs
+++ b/version-helper/src/lib.rs
@@ -85,10 +85,12 @@ fn cargo_mtime_date(crate_dir: path::PathBuf) -> Option<chrono::DateTime<chrono:
     let metadata = fs::metadata(&cargo_toml).ok()?;
     let mtime = metadata.modified().ok()?;
     let unix_time = mtime.duration_since(SystemTime::UNIX_EPOCH).ok()?;
-    let dt = chrono::Utc.timestamp(unix_time.as_secs().try_into().ok()?, 0);
+    let dt = chrono::Utc
+        .timestamp_opt(unix_time.as_secs().try_into().ok()?, 0)
+        .latest()?;
 
     // FIXME: Work around https://github.com/rust-lang/cargo/issues/10285
-    if dt.date().year() < 2015 {
+    if dt.date_naive().year() < 2015 {
         return None;
     }