diff --git a/chrono-tz/Cargo.toml b/chrono-tz/Cargo.toml
index 825ca20..28e7ec4 100644
--- a/chrono-tz/Cargo.toml
+++ b/chrono-tz/Cargo.toml
@@ -30,7 +30,7 @@ include = [
 
 [dependencies]
 arbitrary = { version = "1.2", optional = true, features = ["derive"] }
-chrono = { version = "0.4.24", default-features = false }
+chrono = { version = "0.4.25", default-features = false }
 serde = { version = "1.0.99", optional = true, default-features = false }
 phf = { version = "0.11", default-features = false }
 uncased = { version = "0.9", optional = true, default-features = false }
diff --git a/chrono-tz/src/timezone_impl.rs b/chrono-tz/src/timezone_impl.rs
index e6c35ee..4c1e3f4 100644
--- a/chrono-tz/src/timezone_impl.rs
+++ b/chrono-tz/src/timezone_impl.rs
@@ -328,7 +328,7 @@ impl TimeZone for Tz {
     // First search for a timespan that the local datetime falls into, then, if it exists,
     // check the two surrounding timespans (if they exist) to see if there is any ambiguity.
     fn offset_from_local_datetime(&self, local: &NaiveDateTime) -> LocalResult<Self::Offset> {
-        let timestamp = local.timestamp();
+        let timestamp = local.and_utc().timestamp();
         let timespans = self.timespans();
         let index = binary_search(0, timespans.len(), |i| timespans.local_span(i).cmp(timestamp));
         TzOffset::map_localresult(
@@ -360,8 +360,8 @@ impl TimeZone for Tz {
 
     // Binary search for the required timespan. Any i64 is guaranteed to fall within
     // exactly one timespan, no matter what (so the `unwrap` is safe).
-    fn offset_from_utc_datetime(&self, utc: &NaiveDateTime) -> Self::Offset {
-        let timestamp = utc.timestamp();
+    fn offset_from_utc_datetime(&self, dt: &NaiveDateTime) -> Self::Offset {
+        let timestamp = dt.and_utc().timestamp();
         let timespans = self.timespans();
         let index =
             binary_search(0, timespans.len(), |i| timespans.utc_span(i).cmp(timestamp)).unwrap();
diff --git a/chrono-tz/tests/check-regex-filtering/src/lib.rs b/chrono-tz/tests/check-regex-filtering/src/lib.rs
index c8d169a..9db6010 100644
--- a/chrono-tz/tests/check-regex-filtering/src/lib.rs
+++ b/chrono-tz/tests/check-regex-filtering/src/lib.rs
@@ -19,7 +19,7 @@ mod tests {
     fn london_compiles() {
         // This line will be a compilation failure if the code generation
         // mistakenly excluded Europe::London.
-        let _london_time = London.ymd(2013, 12, 25).and_hms(14, 0, 0);
+        let _london_time = London.with_ymd_and_hms(2013, 12, 25, 14, 0, 0);
         assert_eq!("Europe/London", London.name());
 
         // Since London is included, converting from the corresponding