diff --git a/audio_service/pubspec.yaml b/audio_service/pubspec.yaml
index 86207f6d..5b85179e 100644
--- a/audio_service/pubspec.yaml
+++ b/audio_service/pubspec.yaml
@@ -31,8 +31,8 @@ dependencies:
   #     path: audio_service_web
 
   # Use these deps when publishing.
-  audio_service_platform_interface: ^0.1.2
-  audio_service_web: ^0.1.3
+  audio_service_platform_interface: ^0.1.3
+  audio_service_web: ^0.1.4
 
   audio_session: ^0.1.20
   rxdart: '>=0.26.0 <0.29.0'
diff --git a/audio_service_web/lib/audio_service_web.dart b/audio_service_web/lib/audio_service_web.dart
index 82d562eb..059aa1f7 100644
--- a/audio_service_web/lib/audio_service_web.dart
+++ b/audio_service_web/lib/audio_service_web.dart
@@ -17,11 +17,11 @@ class AudioServiceWeb extends AudioServicePlatform {
   web.MediaSession get _mediaSession => web.window.navigator.mediaSession;
 
   final _mediaSessionSupported = _SupportChecker(
-        () => js.globalContext.hasProperty('MediaSession'.toJS).toDart,
+    () => js.globalContext.hasProperty('MediaSession'.toJS).toDart,
     "MediaSession is not supported in this browser, so plugin is no-op",
   );
   final _setPositionStateSupported = _SupportChecker(
-        () => web.window.navigator.mediaSession
+    () => web.window.navigator.mediaSession
         .hasProperty('setPositionState'.toJS)
         .toDart,
     "MediaSession.setPositionState is not supported in this browser",
@@ -112,7 +112,7 @@ class AudioServiceWeb extends AudioServicePlatform {
           );
           break;
         default:
-        // no-op
+          // no-op
           break;
       }
     }
@@ -125,13 +125,13 @@ class AudioServiceWeb extends AudioServicePlatform {
               ((MediaSessionActionDetails details) {
                 // Browsers use seconds
                 handlerCallbacks?.seek(SeekRequest(
-                  position:
-                  Duration(milliseconds: (details.seekTime * 1000).round()),
+                  position: Duration(
+                      milliseconds: (details.seekTime! * 1000).round()),
                 ));
               }).toJS);
           break;
         default:
-        // no-op
+          // no-op
           break;
       }
     }
@@ -164,17 +164,18 @@ class AudioServiceWeb extends AudioServicePlatform {
       return;
     }
     mediaItem = request.mediaItem;
-    final artist = mediaItem!.artist;
-    final album = mediaItem!.album;
+    final artist = mediaItem!.artist ?? '';
+    final album = mediaItem!.album ?? '';
     final artUri = mediaItem!.artUri;
 
     _mediaSession.metadata = web.MediaMetadata(
       web.MediaMetadataInit(
         title: mediaItem!.title,
-        artist: artist.toString(),
-        album: album.toString(),
+        artist: artist,
+        album: album,
         artwork: [
-          web.MediaImage(src: artUri.toString(), sizes: '512x512'),
+          if (artUri != null)
+            web.MediaImage(src: artUri.toString(), sizes: '512x512'),
         ].toJS,
       ),
     );
diff --git a/audio_service_web/lib/js/media_session_web.dart b/audio_service_web/lib/js/media_session_web.dart
index 91470e15..9a5846c6 100644
--- a/audio_service_web/lib/js/media_session_web.dart
+++ b/audio_service_web/lib/js/media_session_web.dart
@@ -7,7 +7,6 @@
 library media_session_web;
 
 import 'dart:js_interop';
-import 'package:web/web.dart' as web;
 
 /// Media session playback state types.
 ///
@@ -54,41 +53,41 @@ typedef MediaSessionActionHandler = dynamic Function(MediaSessionActionDetails);
 @JS()
 @anonymous
 extension type MediaSessionActionDetails._(JSObject _) implements JSObject {
-/// An action type string taken from the [MediaActions], indicating which
-/// type of action needs to be performed.
-external String get action;
+  /// An action type string taken from the [MediaActions], indicating which
+  /// type of action needs to be performed.
+  external String get action;
 
-/// Indicates whether or not to perform a "fast" seek.
-///
-/// A `seekto` action may optionally include this property.
-///
-/// A "fast" seek is a seek being performed in a rapid sequence, such as when
-/// fast-forwarding or reversing through the media, rapidly skipping through it.
-///
-/// This property can be used to indicate that you should use the shortest possible
-/// method to seek the media. This property is not included on the final action in
-/// the seek sequence in this situation.
-external bool get fastSeek;
+  /// Indicates whether or not to perform a "fast" seek.
+  ///
+  /// A `seekto` action may optionally include this property.
+  ///
+  /// A "fast" seek is a seek being performed in a rapid sequence, such as when
+  /// fast-forwarding or reversing through the media, rapidly skipping through it.
+  ///
+  /// This property can be used to indicate that you should use the shortest possible
+  /// method to seek the media. This property is not included on the final action in
+  /// the seek sequence in this situation.
+  external bool? get fastSeek;
 
-/// If the action is either `seekforward` or `seekbackward`
-/// and this property is present, it is a floating point value which indicates
-/// the seek interval.
-///
-/// If this property isn't present, those actions should choose a reasonable
-/// default interval.
-external double get seekOffset;
+  /// If the action is either `seekforward` or `seekbackward`
+  /// and this property is present, it is a floating point value which indicates
+  /// the seek interval.
+  ///
+  /// If this property isn't present, those actions should choose a reasonable
+  /// default interval.
+  external double? get seekOffset;
 
-/// If the action is `seekto`, this property is present and
-/// indicates the absolute time within the media to move the playback position to.
-///
-/// This property is not present for other action types.
-external double get seekTime;
+  /// If the action is `seekto`, this property is present and
+  /// indicates the absolute time within the media to move the playback position to.
+  ///
+  /// This property is not present for other action types.
+  external double? get seekTime;
 
-/// Creates the details.
-external factory MediaSessionActionDetails({
-String? action,
-bool? fastSeek,
-double? seekOffset,
-double? seekTime,
-});
+  /// Creates the details.
+  external factory MediaSessionActionDetails({
+    String? action,
+    bool? fastSeek,
+    double? seekOffset,
+    double? seekTime,
+  });
 }
diff --git a/audio_service_web/pubspec.yaml b/audio_service_web/pubspec.yaml
index 697499d7..2bf581e9 100644
--- a/audio_service_web/pubspec.yaml
+++ b/audio_service_web/pubspec.yaml
@@ -1,6 +1,6 @@
 name: audio_service_web
 description: Web platform implementation of audio_service. This implementation is endorsed and therefore doesn't require a direct dependency.
-version: 0.1.3
+version: 0.1.4
 homepage: https://github.com/ryanheise/audio_service/tree/master/audio_service_web
 
 environment: