diff --git a/CHANGELOG.md b/CHANGELOG.md
index a8e1709..b4c4fa7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## [1.0.0] - 2021-03-10
+* Support null-safefty
+* Use open source [native_pdf_view](https://pub.dev/packages/native_pdf_view) package instead of commercial package
+* Improved video controls
+
 ## [0.2.0] - 2021-02-02
 * A `MediaProvider` can now also have a description that can be useful when sharing the media to other apps.
 * The hero animation now works also for text media.
diff --git a/lib/enough_media.dart b/lib/enough_media.dart
index 3b46062..4639c02 100644
--- a/lib/enough_media.dart
+++ b/lib/enough_media.dart
@@ -9,6 +9,6 @@ export 'preview/all_preview.dart';
 export 'widget_registry.dart';
 
 export 'package:flutter_sound_lite/flutter_sound.dart';
-export 'package:syncfusion_flutter_pdfviewer/pdfviewer.dart';
+export 'package:native_pdf_view/native_pdf_view.dart';
 export 'package:video_player/video_player.dart';
 export 'package:chewie/chewie.dart';
diff --git a/lib/interactive/audio_interactive_media.dart b/lib/interactive/audio_interactive_media.dart
index 8f64cfb..e3df948 100644
--- a/lib/interactive/audio_interactive_media.dart
+++ b/lib/interactive/audio_interactive_media.dart
@@ -7,8 +7,8 @@ import '../media_provider.dart';
 class AudioInteractiveMedia extends StatefulWidget {
   final MediaProvider mediaProvider;
   AudioInteractiveMedia({
-    Key key,
-    @required this.mediaProvider,
+    Key? key,
+    required this.mediaProvider,
   }) : super(key: key);
 
   @override
@@ -16,14 +16,13 @@ class AudioInteractiveMedia extends StatefulWidget {
 }
 
 class _AudioInteractiveMediaState extends State<AudioInteractiveMedia> {
-  String name;
-  FlutterSoundPlayer audioPlayer;
-  Track track;
+  late String name;
+  late Track track;
 
   @override
   void initState() {
     final provider = widget.mediaProvider;
-    name = provider.name ?? '<unknown>';
+    name = provider.name;
     if (provider is MemoryMediaProvider) {
       track = Track(dataBuffer: provider.data, trackTitle: name);
     } else if (provider is UrlMediaProvider) {
diff --git a/lib/interactive/image_interactive_media.dart b/lib/interactive/image_interactive_media.dart
index ef9b722..d09409f 100644
--- a/lib/interactive/image_interactive_media.dart
+++ b/lib/interactive/image_interactive_media.dart
@@ -5,7 +5,7 @@ import 'package:photo_view/photo_view.dart';
 /// Displays zoomable images
 class ImageInteractiveMedia extends StatelessWidget {
   final MediaProvider mediaProvider;
-  const ImageInteractiveMedia({Key key, @required this.mediaProvider})
+  const ImageInteractiveMedia({Key? key, required this.mediaProvider})
       : super(key: key);
 
   @override
diff --git a/lib/interactive/pdf_interactive_media.dart b/lib/interactive/pdf_interactive_media.dart
index 8657f8d..0d880fd 100644
--- a/lib/interactive/pdf_interactive_media.dart
+++ b/lib/interactive/pdf_interactive_media.dart
@@ -1,12 +1,11 @@
 import 'package:enough_media/media_provider.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:syncfusion_flutter_pdfviewer/pdfviewer.dart';
+import 'package:native_pdf_view/native_pdf_view.dart';
 
 /// Displays PDFs
 class PdfInteractiveMedia extends StatefulWidget {
   final MediaProvider mediaProvider;
-  PdfInteractiveMedia({Key key, @required this.mediaProvider})
+  PdfInteractiveMedia({Key? key, required this.mediaProvider})
       : super(key: key);
 
   @override
@@ -14,63 +13,56 @@ class PdfInteractiveMedia extends StatefulWidget {
 }
 
 class _PdfInteractiveMediaState extends State<PdfInteractiveMedia> {
-  PdfViewerController pdfViewerController;
-  OverlayEntry overlayEntry;
+  late PdfController pdfController;
 
   @override
   void initState() {
-    pdfViewerController = PdfViewerController();
+    pdfController = PdfController(document: initDocument(widget.mediaProvider));
     super.initState();
   }
 
-  @override
-  Widget build(BuildContext context) {
-    final provider = widget.mediaProvider;
+  Future<PdfDocument> initDocument(final MediaProvider provider) {
     if (provider is MemoryMediaProvider) {
-      return SfPdfViewer.memory(
-        provider.data,
-        controller: pdfViewerController,
-        onTextSelectionChanged: onTextSelectionChanged,
-      );
-    } else if (provider is UrlMediaProvider) {
-      return SfPdfViewer.network(
-        provider.url,
-        controller: pdfViewerController,
-        onTextSelectionChanged: onTextSelectionChanged,
-      );
+      return PdfDocument.openData(provider.data);
+      // } else if (provider is UrlMediaProvider) {
+      //     provider.url
+      //   );
     } else if (provider is AssetMediaProvider) {
-      return SfPdfViewer.asset(
-        provider.assetName,
-        controller: pdfViewerController,
-        onTextSelectionChanged: onTextSelectionChanged,
-      );
+      return PdfDocument.openAsset(provider.assetName);
     } else {
       throw StateError('Unsupported media provider $provider');
     }
   }
 
-  void onTextSelectionChanged(PdfTextSelectionChangedDetails details) {
-    if (details.selectedText == null && overlayEntry != null) {
-      overlayEntry.remove();
-      overlayEntry = null;
-    } else if (details.selectedText != null && overlayEntry == null) {
-      final OverlayState overlayState = Overlay.of(context);
-      overlayEntry = OverlayEntry(
-        builder: (context) => Positioned(
-          top: details.globalSelectedRegion.center.dy - 55,
-          left: details.globalSelectedRegion.bottomLeft.dx,
-          child: RaisedButton(
-            child: Text('Copy', style: TextStyle(fontSize: 17)),
-            onPressed: () {
-              Clipboard.setData(ClipboardData(text: details.selectedText));
-              pdfViewerController.clearSelection();
-            },
-            color: Colors.white,
-            elevation: 10,
-          ),
-        ),
-      );
-      overlayState.insert(overlayEntry);
-    }
+  @override
+  Widget build(BuildContext context) {
+    return PdfView(
+      controller: pdfController,
+    );
   }
+
+  // void onTextSelectionChanged(PdfTextSelectionChangedDetails details) {
+  //   if (details.selectedText == null && overlayEntry != null) {
+  //     overlayEntry.remove();
+  //     overlayEntry = null;
+  //   } else if (details.selectedText != null && overlayEntry == null) {
+  //     final OverlayState overlayState = Overlay.of(context);
+  //     overlayEntry = OverlayEntry(
+  //       builder: (context) => Positioned(
+  //         top: details.globalSelectedRegion.center.dy - 55,
+  //         left: details.globalSelectedRegion.bottomLeft.dx,
+  //         child: RaisedButton(
+  //           child: Text('Copy', style: TextStyle(fontSize: 17)),
+  //           onPressed: () {
+  //             Clipboard.setData(ClipboardData(text: details.selectedText));
+  //             pdfViewerController.clearSelection();
+  //           },
+  //           color: Colors.white,
+  //           elevation: 10,
+  //         ),
+  //       ),
+  //     );
+  //     overlayState.insert(overlayEntry);
+  //   }
+  // }
 }
diff --git a/lib/interactive/video_interactive_media.dart b/lib/interactive/video_interactive_media.dart
index 3801269..4980eb1 100644
--- a/lib/interactive/video_interactive_media.dart
+++ b/lib/interactive/video_interactive_media.dart
@@ -8,16 +8,17 @@ import '../media_provider.dart';
 
 class VideoInteractiveMedia extends StatefulWidget {
   final MediaProvider mediaProvider;
-  VideoInteractiveMedia({Key key, this.mediaProvider}) : super(key: key);
+  VideoInteractiveMedia({Key? key, required this.mediaProvider})
+      : super(key: key);
 
   @override
   _VideoInteractiveMediaState createState() => _VideoInteractiveMediaState();
 }
 
 class _VideoInteractiveMediaState extends State<VideoInteractiveMedia> {
-  VideoPlayerController _videoController;
-  ChewieController _chewieController;
-  Future<VideoPlayerController> _loader;
+  late VideoPlayerController _videoController;
+  late ChewieController _chewieController;
+  late Future<VideoPlayerController> _loader;
 
   @override
   void initState() {
@@ -26,10 +27,8 @@ class _VideoInteractiveMediaState extends State<VideoInteractiveMedia> {
   }
 
   void dispose() {
-    if (_videoController != null) {
-      _videoController.dispose();
-      _chewieController.dispose();
-    }
+    _videoController.dispose();
+    _chewieController.dispose();
     super.dispose();
   }
 
@@ -81,12 +80,9 @@ class _VideoInteractiveMediaState extends State<VideoInteractiveMedia> {
           case ConnectionState.waiting:
           case ConnectionState.active:
             return Center(child: CircularProgressIndicator());
-            break;
           case ConnectionState.done:
             return buildVideo();
-            break;
         }
-        return Text('loading video...');
       },
     );
   }
diff --git a/lib/interactive_media_widget.dart b/lib/interactive_media_widget.dart
index d5224a1..49b2dca 100644
--- a/lib/interactive_media_widget.dart
+++ b/lib/interactive_media_widget.dart
@@ -6,10 +6,10 @@ import 'package:flutter/material.dart';
 class InteractiveMediaWidget extends StatelessWidget {
   final MediaProvider mediaProvider;
   final bool useRegistry;
-  final Object heroTag;
+  final Object? heroTag;
   const InteractiveMediaWidget({
-    Key key,
-    @required this.mediaProvider,
+    Key? key,
+    required this.mediaProvider,
     this.useRegistry = false,
     this.heroTag,
   }) : super(key: key);
@@ -17,7 +17,7 @@ class InteractiveMediaWidget extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     if (heroTag != null) {
-      return Hero(tag: heroTag, child: _buildMedia());
+      return Hero(tag: heroTag!, child: _buildMedia());
     }
     return _buildMedia();
   }
@@ -27,7 +27,7 @@ class InteractiveMediaWidget extends StatelessWidget {
     if (useRegistry) {
       final registry = WidgetRegistry();
       if (registry.resolveInteractive != null) {
-        final resolved = registry.resolveInteractive(provider);
+        final resolved = registry.resolveInteractive!(provider);
         if (resolved != null) {
           return resolved;
         }
diff --git a/lib/media_provider.dart b/lib/media_provider.dart
index 9f2155d..6ec7799 100644
--- a/lib/media_provider.dart
+++ b/lib/media_provider.dart
@@ -8,10 +8,10 @@ class MediaProvider {
   final String mediaType;
 
   /// The size in bytes, if known
-  final int size;
+  final int? size;
 
   /// Description, can be useful when sharing this media
-  final String description;
+  final String? description;
 
   /// Creates a new media provider with the given [name], [mediaType] like application/pdf, [size] in bytes and [description].
   MediaProvider(this.name, this.mediaType, this.size, {this.description});
@@ -46,7 +46,7 @@ class UrlMediaProvider extends MediaProvider {
   /// Creates a new URL media provider with the given [name], [mediaType] and [url].
   /// Optionally specify the [size] in bytes and the [description].
   UrlMediaProvider(String name, String mediaType, this.url,
-      {int size, String description})
+      {int? size, String? description})
       : super(name, mediaType, size, description: description);
 }
 
@@ -58,7 +58,7 @@ class MemoryMediaProvider extends MediaProvider {
   /// Creates a new meemory media provider with the given [name], [mediaType] and [data].
   /// Optionally specify the [description].
   MemoryMediaProvider(String name, String mediaType, this.data,
-      {String description})
+      {String? description})
       : super(name, mediaType, data.length, description: description);
 }
 
@@ -70,13 +70,13 @@ class AssetMediaProvider extends MediaProvider {
   /// Creates a new asset media provider with the given [name], [mediaType] and [assetName].
   /// Optionally specify the [size] in bytes and the [description].
   AssetMediaProvider(String name, String mediaType, this.assetName,
-      {String description})
+      {String? description})
       : super(name, mediaType, null, description: description);
 }
 
 class TextMediaProvider extends MediaProvider {
   final String text;
   TextMediaProvider(String name, String mediaType, this.text,
-      {String description})
+      {String? description})
       : super(name, mediaType, null, description: description);
 }
diff --git a/lib/preview/image_preview.dart b/lib/preview/image_preview.dart
index 884a2d8..cae9c5f 100644
--- a/lib/preview/image_preview.dart
+++ b/lib/preview/image_preview.dart
@@ -5,11 +5,11 @@ import 'package:flutter/material.dart';
 class ImagePreview extends StatelessWidget {
   final MediaProvider mediaProvider;
   final BoxFit fit;
-  final double width;
-  final double height;
+  final double? width;
+  final double? height;
   const ImagePreview(
-      {Key key,
-      @required this.mediaProvider,
+      {Key? key,
+      required this.mediaProvider,
       this.fit = BoxFit.cover,
       this.width,
       this.height})
diff --git a/lib/preview_media_widget.dart b/lib/preview_media_widget.dart
index 5aeb0fa..52f0dcd 100644
--- a/lib/preview_media_widget.dart
+++ b/lib/preview_media_widget.dart
@@ -17,32 +17,32 @@ class PreviewMediaWidget extends StatefulWidget {
   final bool useRegistry;
 
   /// The width of the preview media
-  final double width;
+  final double? width;
 
   /// The height of the preview media
-  final double height;
+  final double? height;
 
   /// Optional delegate to switch to (typically fullscreen) interactive mode
-  final Future Function(InteractiveMediaWidget) showInteractiveDelegate;
+  final Future Function(InteractiveMediaWidget)? showInteractiveDelegate;
 
   /// Optional fallback widget that is shown when an unsupported media is encountered
-  final Widget fallbackWidget;
+  final Widget? fallbackWidget;
 
   /// Optional list of context menu entries.
   ///
   /// When the `showInteractiveDelegate` is defined, then the context menu is shown after a long press.
   /// When the `showInteractiveDelegate` is not defined, then the context menu is shown after a press.
   /// Note that additionally the onContextMenuSelected delegate needs to be specified
-  final List<PopupMenuEntry> contextMenuEntries;
+  final List<PopupMenuEntry>? contextMenuEntries;
 
   /// Handler for context menu
-  final Function(MediaProvider mediaProvider, dynamic entry)
+  final Function(MediaProvider mediaProvider, dynamic entry)?
       onContextMenuSelected;
 
   /// Creates a new media preview
   PreviewMediaWidget({
-    Key key,
-    @required this.mediaProvider,
+    Key? key,
+    required this.mediaProvider,
     this.width,
     this.height,
     this.showInteractiveDelegate,
@@ -75,7 +75,7 @@ class _PreviewMediaWidgetState extends State<PreviewMediaWidget> {
 
   Widget _buildInteractiveDelegateButton() {
     void Function() onPressed;
-    void Function() onLongPressed;
+    void Function()? onLongPressed;
     if (widget.showInteractiveDelegate != null) {
       onPressed = _showInteractiveDelegate;
       if (this.widget.contextMenuEntries?.isNotEmpty ?? false) {
@@ -103,23 +103,23 @@ class _PreviewMediaWidgetState extends State<PreviewMediaWidget> {
       useRegistry: widget.useRegistry,
       heroTag: widget.mediaProvider,
     );
-    widget.showInteractiveDelegate(interactive);
+    widget.showInteractiveDelegate!(interactive);
   }
 
   void _showContextMenu() async {
     final selectedValue = await showMenu(
-      items: widget.contextMenuEntries,
+      items: widget.contextMenuEntries!,
       context: context,
       position: _getPosition((widget.width ?? 60) / 2),
     );
     if (selectedValue != null && widget.onContextMenuSelected != null) {
-      widget.onContextMenuSelected(widget.mediaProvider, selectedValue);
+      widget.onContextMenuSelected!(widget.mediaProvider, selectedValue);
     }
   }
 
-  RelativeRect _getPosition(double shift) {
+  RelativeRect _getPosition(double? shift) {
     shift ??= 60;
-    final rb = context.findRenderObject() as RenderBox;
+    final rb = context.findRenderObject() as RenderBox?;
     final offset = rb?.localToGlobal(Offset.zero);
     double left = (offset?.dx ?? 120) + shift;
     double top = (offset?.dy ?? 120) + shift;
@@ -153,7 +153,7 @@ class _PreviewMediaWidgetState extends State<PreviewMediaWidget> {
       );
     }
     if (widget.fallbackWidget != null) {
-      return widget.fallbackWidget;
+      return widget.fallbackWidget!;
     }
     return Container(
       width: widget.width,
@@ -162,12 +162,12 @@ class _PreviewMediaWidgetState extends State<PreviewMediaWidget> {
     );
   }
 
-  Widget resolveFromRegistry() {
+  Widget? resolveFromRegistry() {
     final registry = WidgetRegistry();
     final provider = widget.mediaProvider;
     if (registry.resolvePreview != null) {
       final resolved =
-          registry.resolvePreview(provider, widget.width, widget.height);
+          registry.resolvePreview!(provider, widget.width, widget.height);
       if (resolved != null) {
         return resolved;
       }
diff --git a/lib/widget_registry.dart b/lib/widget_registry.dart
index 893fc7e..5c44ecf 100644
--- a/lib/widget_registry.dart
+++ b/lib/widget_registry.dart
@@ -3,17 +3,17 @@ import 'package:enough_media/media_provider.dart';
 import 'package:flutter/widgets.dart';
 
 class WidgetRegistry {
-  static WidgetRegistry _instance;
+  static WidgetRegistry _instance = WidgetRegistry._internal();
   final previewRegistry =
-      <String, Widget Function(MediaProvider, double width, double height)>{};
+      <String, Widget Function(MediaProvider, double? width, double? height)>{};
   final interactiveRegistry = <String, Widget Function(MediaProvider)>{};
-  Widget Function(MediaProvider, double width, double height) resolvePreview;
-  Widget Function(MediaProvider) resolveInteractive;
+  Widget? Function(MediaProvider, double? width, double? height)?
+      resolvePreview;
+  Widget? Function(MediaProvider)? resolveInteractive;
 
   WidgetRegistry._internal();
 
   factory WidgetRegistry() {
-    _instance ??= WidgetRegistry._internal();
     return _instance;
   }
 }
diff --git a/pubspec.yaml b/pubspec.yaml
index 85ddb6a..15ebc2d 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,21 +1,21 @@
 name: enough_media
 description: Extensible collection of media viewers for preview and interactive experiences.
-version: 0.2.0
+version: 1.0.0
 homepage: https://github.com/enough-software/enough_media
 
 environment:
-  sdk: ">=2.7.0 <3.0.0"
-  flutter: ">=1.17.0"
+  sdk: ">=2.12.0 <3.0.0"
+  flutter: ">=2.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
-  syncfusion_flutter_pdfviewer: ^18.4.46-beta
-  photo_view: ^0.10.3
-  flutter_sound_lite: ^7.7.0+1
-  video_player: ^2.0.0
-  chewie: ^1.0.0
-  path_provider: ^1.6.27
+  native_pdf_view: '>=4.0.0 <6.0.0' 
+  photo_view: '>=0.11.1 <2.0.0'
+  flutter_sound_lite: '>=8.0.0+2 <10.0.0'
+  video_player: '>=2.0.0 <4.0.0'
+  chewie: '>=1.0.0 <3.0.0'
+  path_provider: '>=2.0.1 <4.0.0'
 
 
 dev_dependencies: