diff --git a/geolocator_platform_interface/CHANGELOG.md b/geolocator_platform_interface/CHANGELOG.md
index fb4ff66b..eb5ffe5d 100644
--- a/geolocator_platform_interface/CHANGELOG.md
+++ b/geolocator_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.2.0
+
+- Replaces an optional DateTime? `timestamp` in `Position` object for an NonNull DateTime `timestamp`. 
+
 ## 4.1.1
 
 - Updates dependencies to latest versions to prevent conflicts with other packages.
diff --git a/geolocator_platform_interface/lib/src/models/position.dart b/geolocator_platform_interface/lib/src/models/position.dart
index 5fdf1566..d6a49141 100644
--- a/geolocator_platform_interface/lib/src/models/position.dart
+++ b/geolocator_platform_interface/lib/src/models/position.dart
@@ -30,7 +30,7 @@ class Position {
   final double longitude;
 
   /// The time at which this position was determined.
-  final DateTime? timestamp;
+  final DateTime timestamp;
 
   /// The altitude of the device in meters.
   ///
@@ -141,10 +141,9 @@ class Position {
           'The supplied map doesn\'t contain the mandatory key `longitude`.');
     }
 
-    final timestamp = positionMap['timestamp'] != null
-        ? DateTime.fromMillisecondsSinceEpoch(positionMap['timestamp'].toInt(),
-            isUtc: true)
-        : null;
+    final timestamp = DateTime.fromMillisecondsSinceEpoch(
+        positionMap['timestamp'].toInt(),
+        isUtc: true);
 
     return Position(
       latitude: positionMap['latitude'],
@@ -167,7 +166,7 @@ class Position {
   Map<String, dynamic> toJson() => {
         'longitude': longitude,
         'latitude': latitude,
-        'timestamp': timestamp?.millisecondsSinceEpoch,
+        'timestamp': timestamp.millisecondsSinceEpoch,
         'accuracy': accuracy,
         'altitude': altitude,
         'altitude_accuracy': altitudeAccuracy,
diff --git a/geolocator_platform_interface/pubspec.yaml b/geolocator_platform_interface/pubspec.yaml
index 82489c08..efb3104c 100644
--- a/geolocator_platform_interface/pubspec.yaml
+++ b/geolocator_platform_interface/pubspec.yaml
@@ -3,7 +3,7 @@ description: A common platform interface for the geolocator plugin.
 repository: https://github.com/baseflow/flutter-geolocator/tree/main/geolocator_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 4.1.1
+version: 4.2.0
 
 dependencies:
   flutter: