diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3581d0b..6176d82 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,15 @@
+## 3.0.0
+
+* Null safety and interim gif support.
+
 ## 2.0.2-alpha
 
 * Limited gif support. Gifs are compressed into webp and rendered as of now.
 
 ## 2.0.1
 
-* Update to null safety package dependencies. OCI still needs to migrate code to respect null safety. Additionally fix issue with hero widgets
+* Update to null safety package dependencies. OCI still needs to migrate code to respect null safety. Additionally fix
+  issue with hero widgets
 
 ## 2.0.0
 
@@ -28,7 +33,8 @@
 
 ## 1.0.0-beta
 
-* Prevent unnecessary downloads from happening by caching the image from the original url and resizing it for different sizes.
+* Prevent unnecessary downloads from happening by caching the image from the original url and resizing it for different
+  sizes.
 
 ## 0.1.15
 
@@ -62,25 +68,24 @@
 
 * Fix dependency version breaking change in flutter cache library.
 
-
 ## 0.1.7
 
-
 * Add style fixes
 
 ## 0.1.6
 
-* Add experimental support for streamed downloading via `useHttpStream` flag which further
-reduces the memory footprint.
+* Add experimental support for streamed downloading via `useHttpStream` flag which further reduces the memory footprint.
 
 ## 0.1.5
 
 * Minor lint issues and formatting patched.
 
 ## 0.1.4
+
 * Fixed issue faced while specifying custom width and height.
 
 ## 0.1.3
+
 * Readme updated.
 
 ## 0.1.2
diff --git a/example/ios/Podfile b/example/ios/Podfile
index b30a428..1e8c3c9 100644
--- a/example/ios/Podfile
+++ b/example/ios/Podfile
@@ -10,81 +10,32 @@ project 'Runner', {
   'Release' => :release,
 }
 
-def parse_KV_file(file, separator='=')
-  file_abs_path = File.expand_path(file)
-  if !File.exists? file_abs_path
-    return [];
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
   end
-  generated_key_values = {}
-  skip_line_start_symbols = ["#", "/"]
-  File.foreach(file_abs_path) do |line|
-    next if skip_line_start_symbols.any? { |symbol| line =~ /^\s*#{symbol}/ }
-    plugin = line.split(pattern=separator)
-    if plugin.length == 2
-      podname = plugin[0].strip()
-      path = plugin[1].strip()
-      podpath = File.expand_path("#{path}", file_abs_path)
-      generated_key_values[podname] = podpath
-    else
-      puts "Invalid plugin specification: #{line}"
-    end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
   end
-  generated_key_values
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
 end
 
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_ios_podfile_setup
+
 target 'Runner' do
   use_frameworks!
   use_modular_headers!
-  
-  # Flutter Pod
 
-  copied_flutter_dir = File.join(__dir__, 'Flutter')
-  copied_framework_path = File.join(copied_flutter_dir, 'Flutter.framework')
-  copied_podspec_path = File.join(copied_flutter_dir, 'Flutter.podspec')
-  unless File.exist?(copied_framework_path) && File.exist?(copied_podspec_path)
-    # Copy Flutter.framework and Flutter.podspec to Flutter/ to have something to link against if the xcode backend script has not run yet.
-    # That script will copy the correct debug/profile/release version of the framework based on the currently selected Xcode configuration.
-    # CocoaPods will not embed the framework on pod install (before any build phases can generate) if the dylib does not exist.
-
-    generated_xcode_build_settings_path = File.join(copied_flutter_dir, 'Generated.xcconfig')
-    unless File.exist?(generated_xcode_build_settings_path)
-      raise "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter pub get is executed first"
-    end
-    generated_xcode_build_settings = parse_KV_file(generated_xcode_build_settings_path)
-    cached_framework_dir = generated_xcode_build_settings['FLUTTER_FRAMEWORK_DIR'];
-
-    unless File.exist?(copied_framework_path)
-      FileUtils.cp_r(File.join(cached_framework_dir, 'Flutter.framework'), copied_flutter_dir)
-    end
-    unless File.exist?(copied_podspec_path)
-      FileUtils.cp(File.join(cached_framework_dir, 'Flutter.podspec'), copied_flutter_dir)
-    end
-  end
-
-  # Keep pod path relative so it can be checked into Podfile.lock.
-  pod 'Flutter', :path => 'Flutter'
-
-  # Plugin Pods
-
-  # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
-  # referring to absolute paths on developers' machines.
-  system('rm -rf .symlinks')
-  system('mkdir -p .symlinks/plugins')
-  plugin_pods = parse_KV_file('../.flutter-plugins')
-  plugin_pods.each do |name, path|
-    symlink = File.join('.symlinks', 'plugins', name)
-    File.symlink(path, symlink)
-    pod name, :path => File.join(symlink, 'ios')
-  end
+  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
 end
 
-# Prevent Cocoapods from embedding a second Flutter framework and causing an error with the new Xcode build system.
-install! 'cocoapods', :disable_input_output_paths => true
-
 post_install do |installer|
   installer.pods_project.targets.each do |target|
-    target.build_configurations.each do |config|
-      config.build_settings['ENABLE_BITCODE'] = 'NO'
-    end
+    flutter_additional_ios_build_settings(target)
   end
 end
diff --git a/example/ios/Podfile.lock b/example/ios/Podfile.lock
index fd3b40f..d126ca5 100644
--- a/example/ios/Podfile.lock
+++ b/example/ios/Podfile.lock
@@ -21,25 +21,22 @@ PODS:
   - Mantle/extobjc (2.1.1)
   - path_provider (0.0.1):
     - Flutter
-  - path_provider_linux (0.0.1):
-    - Flutter
-  - path_provider_macos (0.0.1):
-    - Flutter
   - SDWebImage/Core (5.5.2)
   - SDWebImageWebPCoder (0.5.0):
     - libwebp (~> 1.0)
     - SDWebImage/Core (~> 5.5)
-  - sqflite (0.0.1):
+  - sqflite (0.0.2):
+    - Flutter
+    - FMDB (>= 2.7.5)
+  - url_launcher (0.0.1):
     - Flutter
-    - FMDB (~> 2.7.2)
 
 DEPENDENCIES:
   - Flutter (from `Flutter`)
   - flutter_image_compress (from `.symlinks/plugins/flutter_image_compress/ios`)
   - path_provider (from `.symlinks/plugins/path_provider/ios`)
-  - path_provider_linux (from `.symlinks/plugins/path_provider_linux/ios`)
-  - path_provider_macos (from `.symlinks/plugins/path_provider_macos/ios`)
   - sqflite (from `.symlinks/plugins/sqflite/ios`)
+  - url_launcher (from `.symlinks/plugins/url_launcher/ios`)
 
 SPEC REPOS:
   trunk:
@@ -56,26 +53,23 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/flutter_image_compress/ios"
   path_provider:
     :path: ".symlinks/plugins/path_provider/ios"
-  path_provider_linux:
-    :path: ".symlinks/plugins/path_provider_linux/ios"
-  path_provider_macos:
-    :path: ".symlinks/plugins/path_provider_macos/ios"
   sqflite:
     :path: ".symlinks/plugins/sqflite/ios"
+  url_launcher:
+    :path: ".symlinks/plugins/url_launcher/ios"
 
 SPEC CHECKSUMS:
-  Flutter: 0e3d915762c693b495b44d77113d4970485de6ec
+  Flutter: 434fef37c0980e73bb6479ef766c45957d4b510c
   flutter_image_compress: 082f8daaf6c1b0c9fe798251c750ef0ecd98d7ae
   FMDB: 2ce00b547f966261cd18927a3ddb07cb6f3db82a
   libwebp: 946cb3063cea9236285f7e9a8505d806d30e07f3
   Mantle: 35238ae6f2e2b2d474fa7b67fee82a59fea71915
   path_provider: abfe2b5c733d04e238b0d8691db0cfd63a27a93c
-  path_provider_linux: 4d630dc393e1f20364f3e3b4a2ff41d9674a84e4
-  path_provider_macos: f760a3c5b04357c380e2fddb6f9db6f3015897e0
   SDWebImage: 4d5c027c935438f341ed33dbac53ff9f479922ca
   SDWebImageWebPCoder: e7ae855f058e3dcae99696920b6a5d134e9dcddf
-  sqflite: 4001a31ff81d210346b500c55b17f4d6c7589dd0
+  sqflite: 6d358c025f5b867b29ed92fc697fd34924e11904
+  url_launcher: 6fef411d543ceb26efce54b05a0a40bfd74cbbef
 
-PODFILE CHECKSUM: 1b66dae606f75376c5f2135a8290850eeb09ae83
+PODFILE CHECKSUM: aafe91acc616949ddb318b77800a7f51bffa2a4c
 
-COCOAPODS: 1.9.1
+COCOAPODS: 1.10.1
diff --git a/example/ios/Runner.xcodeproj/project.pbxproj b/example/ios/Runner.xcodeproj/project.pbxproj
index babb62a..9e89b83 100644
--- a/example/ios/Runner.xcodeproj/project.pbxproj
+++ b/example/ios/Runner.xcodeproj/project.pbxproj
@@ -240,9 +240,28 @@
 			files = (
 			);
 			inputPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
+				"${BUILT_PRODUCTS_DIR}/FMDB/FMDB.framework",
+				"${BUILT_PRODUCTS_DIR}/Mantle/Mantle.framework",
+				"${BUILT_PRODUCTS_DIR}/SDWebImage/SDWebImage.framework",
+				"${BUILT_PRODUCTS_DIR}/SDWebImageWebPCoder/SDWebImageWebPCoder.framework",
+				"${BUILT_PRODUCTS_DIR}/flutter_image_compress/flutter_image_compress.framework",
+				"${BUILT_PRODUCTS_DIR}/libwebp/libwebp.framework",
+				"${BUILT_PRODUCTS_DIR}/path_provider/path_provider.framework",
+				"${BUILT_PRODUCTS_DIR}/sqflite/sqflite.framework",
+				"${BUILT_PRODUCTS_DIR}/url_launcher/url_launcher.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/FMDB.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/Mantle.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/SDWebImage.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/SDWebImageWebPCoder.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/flutter_image_compress.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/libwebp.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/path_provider.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/sqflite.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/url_launcher.framework",
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
diff --git a/example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata b/example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
index 1d526a1..919434a 100644
--- a/example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
+++ b/example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
@@ -2,6 +2,6 @@
 <Workspace
    version = "1.0">
    <FileRef
-      location = "group:Runner.xcodeproj">
+      location = "self:">
    </FileRef>
 </Workspace>
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 23463a8..912fbc5 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -74,18 +74,18 @@ class HumblerookiePluginExample extends StatelessWidget {
         1,
       );
     }
-    return MaterialColor(color.value, swatch);
+    return MaterialColor(color.value, swatch as Map<int, Color>);
   }
 }
 
 /// A Flutter example demonstrating how the [pluginName] plugin could be used
 class AppHome extends StatefulWidget {
   /// Constructs the [AppHome] class
-  AppHome({Key key, this.title}) : super(key: key);
+  AppHome({Key? key, this.title}) : super(key: key);
 
   /// The [title] of the application, which is shown in the application's
   /// title bar.
-  final String title;
+  final String? title;
 
   @override
   _AppHomeState createState() => _AppHomeState();
diff --git a/example/pubspec.lock b/example/pubspec.lock
index 2ffbc26..b6330aa 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -14,7 +14,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0"
+    version: "2.6.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -56,14 +56,14 @@ packages:
       name: crypto
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "3.0.1"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "1.0.3"
   fake_async:
     dependency: transitive
     description:
@@ -77,14 +77,14 @@ packages:
       name: ffi
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.1.2"
   file:
     dependency: "direct main"
     description:
       name: file
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.1.0"
+    version: "6.1.2"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -103,7 +103,7 @@ packages:
       name: flutter_cache_manager
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "3.1.2"
   flutter_image_compress:
     dependency: transitive
     description:
@@ -127,7 +127,7 @@ packages:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.13.1"
+    version: "0.13.3"
   http_parser:
     dependency: transitive
     description:
@@ -169,7 +169,7 @@ packages:
       name: octo_image
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.0.0+1"
   optimized_cached_image:
     dependency: "direct main"
     description:
@@ -190,7 +190,7 @@ packages:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.2"
   path_provider_linux:
     dependency: transitive
     description:
@@ -211,28 +211,28 @@ packages:
       name: path_provider_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.0.1"
   path_provider_windows:
     dependency: transitive
     description:
       name: path_provider_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.0.1"
   pedantic:
     dependency: transitive
     description:
       name: pedantic
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.11.0"
+    version: "1.11.1"
   petitparser:
     dependency: transitive
     description:
       name: petitparser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.0.2"
+    version: "4.1.0"
   platform:
     dependency: transitive
     description:
@@ -246,21 +246,21 @@ packages:
       name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.2"
+    version: "2.0.1"
   process:
     dependency: transitive
     description:
       name: process
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.1.0"
+    version: "4.2.1"
   rxdart:
     dependency: transitive
     description:
       name: rxdart
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.26.0"
+    version: "0.27.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -272,7 +272,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.1"
   sprintf:
     dependency: transitive
     description:
@@ -335,7 +335,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19"
+    version: "0.3.0"
   typed_data:
     dependency: transitive
     description:
@@ -349,49 +349,49 @@ packages:
       name: url_launcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.7.10"
+    version: "6.0.9"
   url_launcher_linux:
     dependency: transitive
     description:
       name: url_launcher_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.1+4"
+    version: "2.0.0"
   url_launcher_macos:
     dependency: transitive
     description:
       name: url_launcher_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.1+9"
+    version: "2.0.0"
   url_launcher_platform_interface:
     dependency: transitive
     description:
       name: url_launcher_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.9"
+    version: "2.0.4"
   url_launcher_web:
     dependency: transitive
     description:
       name: url_launcher_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.5+3"
+    version: "2.0.1"
   url_launcher_windows:
     dependency: transitive
     description:
       name: url_launcher_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.1+3"
+    version: "2.0.0"
   uuid:
     dependency: transitive
     description:
       name: uuid
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.3"
+    version: "3.0.4"
   vector_math:
     dependency: transitive
     description:
@@ -405,7 +405,7 @@ packages:
       name: win32
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.2.5"
   xdg_directories:
     dependency: transitive
     description:
@@ -419,7 +419,7 @@ packages:
       name: xml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.0.2"
+    version: "5.1.2"
 sdks:
-  dart: ">=2.12.0 <3.0.0"
+  dart: ">=2.13.0 <3.0.0"
   flutter: ">=2.0.0"
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index f4d3050..d48d38a 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -3,7 +3,7 @@ description: Demonstrates how to use the optimized_cached_image plugin.
 publish_to: 'none'
 
 environment:
-  sdk: ">=2.1.0 <3.0.0"
+  sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
   flutter:
@@ -11,11 +11,11 @@ dependencies:
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^0.1.2
-  url_launcher: ^5.4.11
+  cupertino_icons: ^1.0.3
+  url_launcher: ^6.0.9
   optimized_cached_image:
     path: ../
-  file: ^6.1.0
+  file: ^6.1.2
 
 dev_dependencies:
   flutter_test:
diff --git a/lib/src/cache/default_image_cache_manager.dart b/lib/src/cache/default_image_cache_manager.dart
index 6f5b03d..4921bc6 100644
--- a/lib/src/cache/default_image_cache_manager.dart
+++ b/lib/src/cache/default_image_cache_manager.dart
@@ -7,10 +7,10 @@ import 'package:optimized_cached_image/src/cache/image_cache_manager.dart';
 class DefaultImageCacheManager extends CacheManager with OicImageCacheManager {
   static const key = 'libCachedImageData';
 
-  static DefaultImageCacheManager _instance;
+  static DefaultImageCacheManager? _instance;
   factory DefaultImageCacheManager() {
     _instance ??= DefaultImageCacheManager._();
-    return _instance;
+    return _instance!;
   }
   DefaultImageCacheManager._() : super(Config(key));
 }
diff --git a/lib/src/cache/image_cache_manager.dart b/lib/src/cache/image_cache_manager.dart
index 34712e0..bd9809c 100644
--- a/lib/src/cache/image_cache_manager.dart
+++ b/lib/src/cache/image_cache_manager.dart
@@ -1,7 +1,11 @@
+import 'dart:async';
 import 'dart:math';
+import 'package:flutter/widgets.dart';
 import 'package:flutter_cache_manager/flutter_cache_manager.dart';
 import 'package:image/image.dart';
+import 'package:file/file.dart';
 import '../transformer/image_transformer.dart';
+import 'dart:ui' as ui;
 
 const supportedFileNames = ['jpg', 'jpeg', 'png', 'tga', 'gif', 'cur', 'ico'];
 mixin OicImageCacheManager on BaseCacheManager {
@@ -19,11 +23,11 @@ mixin OicImageCacheManager on BaseCacheManager {
 
   Stream<FileResponse> getImageFile(
     String url, {
-    String key,
-    Map<String, String> headers,
-    bool withProgress,
-    int maxHeight,
-    int maxWidth,
+    String? key,
+    Map<String, String>? headers,
+    bool withProgress = false,
+    int? maxHeight,
+    int? maxWidth,
   }) async* {
     if (maxHeight == null && maxWidth == null) {
       yield* getFileStream(url,
@@ -55,7 +59,7 @@ mixin OicImageCacheManager on BaseCacheManager {
         maxHeight: maxHeight,
       );
     }
-    yield* _runningResizes[resizedKey];
+    yield* _runningResizes[resizedKey]!;
     _runningResizes.remove(resizedKey);
   }
 
@@ -63,8 +67,8 @@ mixin OicImageCacheManager on BaseCacheManager {
   Future<FileInfo> _resizeImageFile(
     FileInfo originalFile,
     String key,
-    int maxWidth,
-    int maxHeight,
+    int? maxWidth,
+    int? maxHeight,
   ) async {
     var originalFileName = originalFile.file.path;
     var fileExtension = originalFileName.split('.').last;
@@ -72,7 +76,15 @@ mixin OicImageCacheManager on BaseCacheManager {
       return originalFile;
     }
 
-    var image = decodeImage(await originalFile.file.readAsBytes());
+    var image = await _decodeImage(originalFile.file);
+    var shouldResize = maxWidth != null
+        ? image.width > maxWidth
+        : false || maxHeight != null
+            ? image.height > maxHeight
+            : false;
+
+    if (!shouldResize) return originalFile;
+
     if (maxWidth != null && maxHeight != null) {
       var resizeFactorWidth = image.width / maxWidth;
       var resizeFactorHeight = image.height / maxHeight;
@@ -106,10 +118,10 @@ mixin OicImageCacheManager on BaseCacheManager {
     String url,
     String originalKey,
     String resizedKey,
-    Map<String, String> headers,
+    Map<String, String>? headers,
     bool withProgress, {
-    int maxWidth,
-    int maxHeight,
+    int? maxWidth,
+    int? maxHeight,
   }) async* {
     await for (var response in getFileStream(
       url,
@@ -131,3 +143,21 @@ mixin OicImageCacheManager on BaseCacheManager {
     }
   }
 }
+
+Future<ui.Image> _decodeImage(File file,
+    {int? width, int? height, bool allowUpscaling = false}) {
+  var shouldResize = width != null || height != null;
+  var fileImage = FileImage(file);
+  final image = shouldResize
+      ? ResizeImage(fileImage,
+          width: width, height: height, allowUpscaling: allowUpscaling)
+      : fileImage as ImageProvider;
+  final completer = Completer<ui.Image>();
+  image
+      .resolve(const ImageConfiguration())
+      .addListener(ImageStreamListener((info, _) {
+    completer.complete(info.image);
+    image.evict();
+  }));
+  return completer.future;
+}
diff --git a/lib/src/image_provider/_image_provider_io.dart b/lib/src/image_provider/_image_provider_io.dart
index 04249c9..d2567a5 100644
--- a/lib/src/image_provider/_image_provider_io.dart
+++ b/lib/src/image_provider/_image_provider_io.dart
@@ -29,12 +29,11 @@ class OptimizedCacheImageProvider
     this.cacheManager,
     this.cacheKey,
     //ignore: avoid_unused_constructor_parameters
-    ImageRenderMethodForWeb imageRenderMethodForWeb,
-  })  : assert(url != null),
-        assert(scale != null);
+    ImageRenderMethodForWeb? imageRenderMethodForWeb,
+  });
 
   @override
-  final BaseCacheManager cacheManager;
+  final BaseCacheManager? cacheManager;
 
   /// Web url of the image to load
   @override
@@ -42,7 +41,7 @@ class OptimizedCacheImageProvider
 
   /// Cache key of the image to cache
   @override
-  final String cacheKey;
+  final String? cacheKey;
 
   /// Scale of the image
   @override
@@ -50,17 +49,17 @@ class OptimizedCacheImageProvider
 
   /// Listener to be called when images fails to load.
   @override
-  final image_provider.ErrorListener errorListener;
+  final image_provider.ErrorListener? errorListener;
 
   /// Set headers for the image provider, for example for authentication
   @override
-  final Map<String, String> headers;
+  final Map<String, String>? headers;
 
   @override
-  final int maxHeight;
+  final int? maxHeight;
 
   @override
-  final int maxWidth;
+  final int? maxWidth;
 
   @override
   Future<OptimizedCacheImageProvider> obtainKey(
@@ -87,7 +86,7 @@ class OptimizedCacheImageProvider
   }
 
   Stream<ui.Codec> _loadAsync(
-    OptimizedCacheImageProvider key,
+    image_provider.OptimizedCacheImageProvider key,
     StreamController<ImageChunkEvent> chunkEvents,
     DecoderCallback decode,
   ) async* {
@@ -130,7 +129,7 @@ class OptimizedCacheImageProvider
       // have had a chance to track the key in the cache at all.
       // Schedule a microtask to give the cache a chance to add the key.
       scheduleMicrotask(() {
-        PaintingBinding.instance.imageCache.evict(key);
+        PaintingBinding.instance?.imageCache?.evict(key);
       });
 
       errorListener?.call();
diff --git a/lib/src/image_provider/_image_provider_web.dart b/lib/src/image_provider/_image_provider_web.dart
index 02436ff..d8fafdb 100644
--- a/lib/src/image_provider/_image_provider_web.dart
+++ b/lib/src/image_provider/_image_provider_web.dart
@@ -26,36 +26,34 @@ class OptimizedCacheImageProvider
     this.headers,
     this.cacheManager,
     this.cacheKey,
-    ImageRenderMethodForWeb imageRenderMethodForWeb,
-  })  : _imageRenderMethodForWeb =
-            imageRenderMethodForWeb ?? ImageRenderMethodForWeb.HtmlImage,
-        assert(url != null),
-        assert(scale != null);
+    ImageRenderMethodForWeb? imageRenderMethodForWeb,
+  }) : _imageRenderMethodForWeb =
+            imageRenderMethodForWeb ?? ImageRenderMethodForWeb.HtmlImage;
 
   @override
-  final BaseCacheManager cacheManager;
+  final BaseCacheManager? cacheManager;
 
   @override
   final String url;
 
   @override
-  final String cacheKey;
+  final String? cacheKey;
 
   @override
   final double scale;
 
   /// Listener to be called when images fails to load.
   @override
-  final image_provider.ErrorListener errorListener;
+  final image_provider.ErrorListener? errorListener;
 
   @override
-  final Map<String, String> headers;
+  final Map<String, String>? headers;
 
   @override
-  final int maxHeight;
+  final int? maxHeight;
 
   @override
-  final int maxWidth;
+  final int? maxWidth;
 
   final ImageRenderMethodForWeb _imageRenderMethodForWeb;
 
@@ -78,9 +76,9 @@ class OptimizedCacheImageProvider
         informationCollector: _imageStreamInformationCollector(key));
   }
 
-  InformationCollector _imageStreamInformationCollector(
+  InformationCollector? _imageStreamInformationCollector(
       image_provider.OptimizedCacheImageProvider key) {
-    InformationCollector collector;
+    InformationCollector? collector;
     assert(() {
       collector = () {
         return <DiagnosticsNode>[
@@ -137,7 +135,7 @@ class OptimizedCacheImageProvider
       // have had a chance to track the key in the cache at all.
       // Schedule a microtask to give the cache a chance to add the key.
       scheduleMicrotask(() {
-        PaintingBinding.instance.imageCache.evict(key);
+        PaintingBinding.instance?.imageCache?.evict(key);
       });
 
       errorListener?.call();
diff --git a/lib/src/image_provider/multi_image_stream_completer.dart b/lib/src/image_provider/multi_image_stream_completer.dart
index 58fbe82..63fa5ea 100644
--- a/lib/src/image_provider/multi_image_stream_completer.dart
+++ b/lib/src/image_provider/multi_image_stream_completer.dart
@@ -16,12 +16,11 @@ class MultiImageStreamCompleter extends ImageStreamCompleter {
   /// [chunkEvents] should indicate the [ImageChunkEvent]s of the first image
   /// to show.
   MultiImageStreamCompleter({
-    @required Stream<ui.Codec> codec,
-    @required double scale,
-    Stream<ImageChunkEvent> chunkEvents,
-    InformationCollector informationCollector,
-  })  : assert(codec != null),
-        _informationCollector = informationCollector,
+    required Stream<ui.Codec> codec,
+    required double scale,
+    Stream<ImageChunkEvent>? chunkEvents,
+    InformationCollector? informationCollector,
+  })  : _informationCollector = informationCollector,
         _scale = scale {
     codec.listen((event) {
       if (_timer != null) {
@@ -54,18 +53,18 @@ class MultiImageStreamCompleter extends ImageStreamCompleter {
     }
   }
 
-  ui.Codec _codec;
-  ui.Codec _nextImageCodec;
+  ui.Codec? _codec;
+  ui.Codec? _nextImageCodec;
   final double _scale;
-  final InformationCollector _informationCollector;
-  ui.FrameInfo _nextFrame;
+  final InformationCollector? _informationCollector;
+  ui.FrameInfo? _nextFrame;
   // When the current was first shown.
-  Duration _shownTimestamp;
+  Duration? _shownTimestamp;
   // The requested duration for the current frame;
-  Duration _frameDuration;
+  Duration? _frameDuration;
   // How many frames have been emitted so far.
   int _framesEmitted = 0;
-  Timer _timer;
+  Timer? _timer;
 
   // Used to guard against registering multiple _handleAppFrame callbacks for the same frame.
   bool _frameCallbackScheduled = false;
@@ -73,7 +72,7 @@ class MultiImageStreamCompleter extends ImageStreamCompleter {
   void _switchToNewCodec() {
     _framesEmitted = 0;
     _timer = null;
-    _handleCodecReady(_nextImageCodec);
+    _handleCodecReady(_nextImageCodec!);
     _nextImageCodec = null;
   }
 
@@ -90,22 +89,22 @@ class MultiImageStreamCompleter extends ImageStreamCompleter {
     _frameCallbackScheduled = false;
     if (!hasListeners) return;
     if (_isFirstFrame() || _hasFrameDurationPassed(timestamp)) {
-      _emitFrame(ImageInfo(image: _nextFrame.image, scale: _scale));
+      _emitFrame(ImageInfo(image: _nextFrame!.image, scale: _scale));
       _shownTimestamp = timestamp;
-      _frameDuration = _nextFrame.duration;
+      _frameDuration = _nextFrame!.duration;
       _nextFrame = null;
-      if (_framesEmitted % _codec.frameCount == 0 && _nextImageCodec != null) {
+      if (_framesEmitted % _codec!.frameCount == 0 && _nextImageCodec != null) {
         _switchToNewCodec();
       } else {
-        final completedCycles = _framesEmitted ~/ _codec.frameCount;
-        if (_codec.repetitionCount == -1 ||
-            completedCycles <= _codec.repetitionCount) {
+        final completedCycles = _framesEmitted ~/ _codec!.frameCount;
+        if (_codec!.repetitionCount == -1 ||
+            completedCycles <= _codec!.repetitionCount) {
           _decodeNextFrameAndSchedule();
         }
       }
       return;
     }
-    final delay = _frameDuration - (timestamp - _shownTimestamp);
+    final delay = _frameDuration! - (timestamp - _shownTimestamp!);
     _timer = Timer(delay * timeDilation, _scheduleAppFrame);
   }
 
@@ -115,12 +114,12 @@ class MultiImageStreamCompleter extends ImageStreamCompleter {
 
   bool _hasFrameDurationPassed(Duration timestamp) {
     assert(_shownTimestamp != null);
-    return timestamp - _shownTimestamp >= _frameDuration;
+    return timestamp - _shownTimestamp! >= _frameDuration!;
   }
 
   Future<void> _decodeNextFrameAndSchedule() async {
     try {
-      _nextFrame = await _codec.getNextFrame();
+      _nextFrame = await _codec!.getNextFrame();
     } catch (exception, stack) {
       reportError(
         context: ErrorDescription('resolving an image frame'),
@@ -131,7 +130,7 @@ class MultiImageStreamCompleter extends ImageStreamCompleter {
       );
       return;
     }
-    if (_codec.frameCount == 1) {
+    if (_codec!.frameCount == 1) {
       // ImageStreamCompleter listeners removed while waiting for next frame to
       // be decoded.
       // There's no reason to emit the frame without active listeners.
@@ -141,7 +140,7 @@ class MultiImageStreamCompleter extends ImageStreamCompleter {
 
       // This is not an animated image, just return it and don't schedule more
       // frames.
-      _emitFrame(ImageInfo(image: _nextFrame.image, scale: _scale));
+      _emitFrame(ImageInfo(image: _nextFrame!.image, scale: _scale));
       return;
     }
     _scheduleAppFrame();
@@ -152,7 +151,7 @@ class MultiImageStreamCompleter extends ImageStreamCompleter {
       return;
     }
     _frameCallbackScheduled = true;
-    SchedulerBinding.instance.scheduleFrameCallback(_handleAppFrame);
+    SchedulerBinding.instance?.scheduleFrameCallback(_handleAppFrame);
   }
 
   void _emitFrame(ImageInfo imageInfo) {
diff --git a/lib/src/image_provider/optimized_cached_image_provider.dart b/lib/src/image_provider/optimized_cached_image_provider.dart
index f93c8f4..08aaae5 100644
--- a/lib/src/image_provider/optimized_cached_image_provider.dart
+++ b/lib/src/image_provider/optimized_cached_image_provider.dart
@@ -40,47 +40,47 @@ abstract class OptimizedCacheImageProvider
   /// for the benefits of each method.
   const factory OptimizedCacheImageProvider(
     String url, {
-    int maxHeight,
-    int maxWidth,
-    String cacheKey,
+    int? maxHeight,
+    int? maxWidth,
+    String? cacheKey,
     double scale,
     @Deprecated('ErrorListener is deprecated, use listeners on the imagestream')
-        ErrorListener errorListener,
-    Map<String, String> headers,
-    BaseCacheManager cacheManager,
-    ImageRenderMethodForWeb imageRenderMethodForWeb,
+        ErrorListener? errorListener,
+    Map<String, String>? headers,
+    BaseCacheManager? cacheManager,
+    ImageRenderMethodForWeb? imageRenderMethodForWeb,
   }) = image_provider.OptimizedCacheImageProvider;
 
   /// Optional cache manager. If no cache manager is defined DefaultCacheManager()
   /// will be used.
   ///
   /// When running flutter on the web, the cacheManager is not used.
-  BaseCacheManager get cacheManager;
+  BaseCacheManager? get cacheManager;
 
   /// The errorListener is called when the ImageProvider failed loading the
   /// image. Deprecated in favor of [ImageStreamListener.onError].
   @deprecated
-  ErrorListener get errorListener;
+  ErrorListener? get errorListener;
 
   /// The URL from which the image will be fetched.
   String get url;
 
   /// The Key from image for cache
-  String get cacheKey;
+  String? get cacheKey;
 
   /// The scale to place in the [ImageInfo] object of the image.
   double get scale;
 
   /// The HTTP headers that will be used to fetch image from network.
-  Map<String, String> get headers;
+  Map<String, String>? get headers;
 
   /// Max height in pixels for the image. When set the resized image is
   /// stored in the cache.
-  int get maxHeight;
+  int? get maxHeight;
 
   /// Max width in pixels for the image. When set the resized image is
   /// stored in the cache.
-  int get maxWidth;
+  int? get maxWidth;
 
   @override
   ImageStreamCompleter load(
diff --git a/lib/src/oci_widget.dart b/lib/src/oci_widget.dart
index 7b8a820..5f3ff8c 100644
--- a/lib/src/oci_widget.dart
+++ b/lib/src/oci_widget.dart
@@ -45,8 +45,8 @@ class OptimizedCacheImage extends StatelessWidget {
   /// to clear the image from the [ImageCache].
   static Future evictFromCache(
     String url, {
-    String cacheKey,
-    BaseCacheManager cacheManager,
+    String? cacheKey,
+    BaseCacheManager? cacheManager,
     double scale = 1.0,
   }) async {
     cacheManager = cacheManager ?? DefaultCacheManager();
@@ -54,34 +54,34 @@ class OptimizedCacheImage extends StatelessWidget {
     return OptimizedCacheImageProvider(url, scale: scale).evict();
   }
 
-  OptimizedCacheImageProvider _image;
+  OptimizedCacheImageProvider? _image;
 
   /// Option to use cachemanager with other settings
-  final BaseCacheManager cacheManager;
+  final BaseCacheManager? cacheManager;
 
   /// The target image that is displayed.
   final String imageUrl;
 
   /// The target image's cache key.
-  final String cacheKey;
+  final String? cacheKey;
 
   /// Optional builder to further customize the display of the image.
-  final ImageWidgetBuilder imageBuilder;
+  final ImageWidgetBuilder? imageBuilder;
 
   /// Widget displayed while the target [imageUrl] is loading.
-  final PlaceholderWidgetBuilder placeholder;
+  final PlaceholderWidgetBuilder? placeholder;
 
   /// Widget displayed while the target [imageUrl] is loading.
-  final ProgressIndicatorBuilder progressIndicatorBuilder;
+  final ProgressIndicatorBuilder? progressIndicatorBuilder;
 
   /// Widget displayed while the target [imageUrl] failed loading.
-  final LoadingErrorWidgetBuilder errorWidget;
+  final LoadingErrorWidgetBuilder? errorWidget;
 
   /// The duration of the fade-in animation for the [placeholder].
-  final Duration placeholderFadeInDuration;
+  final Duration? placeholderFadeInDuration;
 
   /// The duration of the fade-out animation for the [placeholder].
-  final Duration fadeOutDuration;
+  final Duration? fadeOutDuration;
 
   /// The curve of the fade-out animation for the [placeholder].
   final Curve fadeOutCurve;
@@ -98,7 +98,7 @@ class OptimizedCacheImage extends StatelessWidget {
   /// aspect ratio. This may result in a sudden change if the size of the
   /// placeholder widget does not match that of the target image. The size is
   /// also affected by the scale factor.
-  final double width;
+  final double? width;
 
   /// If non-null, require the image to have this height.
   ///
@@ -106,13 +106,13 @@ class OptimizedCacheImage extends StatelessWidget {
   /// aspect ratio. This may result in a sudden change if the size of the
   /// placeholder widget does not match that of the target image. The size is
   /// also affected by the scale factor.
-  final double height;
+  final double? height;
 
   /// How to inscribe the image into the space allocated during layout.
   ///
   /// The default varies based on the other fields. See the discussion at
   /// [paintImage].
-  final BoxFit fit;
+  final BoxFit? fit;
 
   /// How to align the image within its bounds.
   ///
@@ -159,14 +159,14 @@ class OptimizedCacheImage extends StatelessWidget {
   final bool matchTextDirection;
 
   /// Optional headers for the http request of the image url
-  final Map<String, String> httpHeaders;
+  final Map<String, String>? httpHeaders;
 
   /// When set to true it will animate from the old image to the new image
   /// if the url changes.
   final bool useOldImageOnUrlChange;
 
   /// If non-null, this color is blended with each image pixel using [colorBlendMode].
-  final Color color;
+  final Color? color;
 
   /// Used to combine [color] with this image.
   ///
@@ -176,7 +176,7 @@ class OptimizedCacheImage extends StatelessWidget {
   /// See also:
   ///
   ///  * [BlendMode], which includes an illustration of the effect of each blend mode.
-  final BlendMode colorBlendMode;
+  final BlendMode? colorBlendMode;
 
   /// Target the interpolation quality for image scaling.
   ///
@@ -184,26 +184,26 @@ class OptimizedCacheImage extends StatelessWidget {
   final FilterQuality filterQuality;
 
   /// Will resize the image in memory to have a certain width using [ResizeImage]
-  final int memCacheWidth;
+  final int? memCacheWidth;
 
   /// Will resize the image in memory to have a certain height using [ResizeImage]
-  final int memCacheHeight;
+  final int? memCacheHeight;
 
   /// Will resize the image and store the resized image in the disk cache.
-  final int maxWidthDiskCache;
+  final int? maxWidthDiskCache;
 
   /// Will resize the image and store the resized image in the disk cache.
-  final int maxHeightDiskCache;
+  final int? maxHeightDiskCache;
 
-  final ImageRenderMethodForWeb imageRenderMethodForWeb;
+  final ImageRenderMethodForWeb? imageRenderMethodForWeb;
 
   /// OptimizedCacheImage shows a network image using a caching mechanism. It also
   /// provides support for a placeholder, showing an error and fading into the
   /// loaded image. Next to that it supports most features of a default Image
   /// widget.
   OptimizedCacheImage({
-    Key key,
-    @required this.imageUrl,
+    Key? key,
+    required this.imageUrl,
     this.httpHeaders,
     this.imageBuilder,
     this.placeholder,
@@ -231,16 +231,7 @@ class OptimizedCacheImage extends StatelessWidget {
     this.maxWidthDiskCache,
     this.maxHeightDiskCache,
     this.imageRenderMethodForWeb,
-  })  : assert(imageUrl != null),
-        assert(fadeOutDuration != null),
-        assert(fadeOutCurve != null),
-        assert(fadeInDuration != null),
-        assert(fadeInCurve != null),
-        assert(alignment != null),
-        assert(filterQuality != null),
-        assert(repeat != null),
-        assert(matchTextDirection != null),
-        super(key: key);
+  }) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -271,8 +262,8 @@ class OptimizedCacheImage extends StatelessWidget {
             : null;
       }
       if (_image == null ||
-          _image.maxHeight != _constrainHeight ||
-          _image.maxWidth != _constrainHeight) {
+          _image?.maxHeight != _constrainHeight ||
+          _image?.maxWidth != _constrainHeight) {
         _image = OptimizedCacheImageProvider(
           imageUrl,
           headers: httpHeaders,
@@ -284,7 +275,7 @@ class OptimizedCacheImage extends StatelessWidget {
         );
       }
       return OctoImage(
-        image: _image,
+        image: _image!,
         imageBuilder: imageBuilder != null ? _octoImageBuilder : null,
         placeholderBuilder: octoPlaceholderBuilder,
         progressIndicatorBuilder: octoProgressIndicatorBuilder,
@@ -296,7 +287,7 @@ class OptimizedCacheImage extends StatelessWidget {
         width: width,
         height: height,
         fit: fit,
-        alignment: alignment,
+        alignment: alignment as Alignment?,
         repeat: repeat,
         matchTextDirection: matchTextDirection,
         color: color,
@@ -309,32 +300,32 @@ class OptimizedCacheImage extends StatelessWidget {
   }
 
   Widget _octoImageBuilder(BuildContext context, Widget child) {
-    return imageBuilder(context, _image);
+    return imageBuilder!(context, _image!);
   }
 
   Widget _octoPlaceholderBuilder(BuildContext context) {
-    return placeholder(context, imageUrl);
+    return placeholder!(context, imageUrl);
   }
 
   Widget _octoProgressIndicatorBuilder(
     BuildContext context,
-    ImageChunkEvent progress,
+    ImageChunkEvent? progress,
   ) {
-    int totalSize;
+    int? totalSize;
     var downloaded = 0;
     if (progress != null) {
       totalSize = progress.expectedTotalBytes;
       downloaded = progress.cumulativeBytesLoaded;
     }
-    return progressIndicatorBuilder(
+    return progressIndicatorBuilder!(
         context, imageUrl, DownloadProgress(imageUrl, totalSize, downloaded));
   }
 
   Widget _octoErrorBuilder(
     BuildContext context,
     Object error,
-    StackTrace stackTrace,
+    StackTrace? stackTrace,
   ) {
-    return errorWidget(context, imageUrl, error);
+    return errorWidget!(context, imageUrl, error);
   }
 }
diff --git a/lib/src/transformer/image_transformer.dart b/lib/src/transformer/image_transformer.dart
index 7c6647c..b1844ad 100644
--- a/lib/src/transformer/image_transformer.dart
+++ b/lib/src/transformer/image_transformer.dart
@@ -31,12 +31,13 @@ class DefaultImageTransformer extends ImageTransformer {
   };
 
   @override
-  Future<FileInfo> transform(FileInfo info, int width, int height) async {
+  Future<FileInfo> transform(FileInfo info, int? width, int? height) async {
     final value = await _scaleImageFile(info, width, height);
     return value;
   }
 
-  Future<FileInfo> _scaleImageFile(FileInfo info, int width, int height) async {
+  Future<FileInfo> _scaleImageFile(
+      FileInfo info, int? width, int? height) async {
     FileInfo fileInfo = info;
     final file = fileInfo.file;
     log("Scaling file.. ${fileInfo.originalUrl}");
@@ -55,7 +56,7 @@ class DefaultImageTransformer extends ImageTransformer {
       final localFileSystem = fileIo.LocalFileSystem();
       resizedFile = localFileSystem.file(scaleInfo.file.path);
 
-      if (resizedFile != null && resizedFile.existsSync()) {
+      if (resizedFile.existsSync()) {
         if (resizedFile.lengthSync() < srcSize) {
           log("Resized success ${fileInfo.originalUrl}");
         } else {
@@ -74,7 +75,7 @@ class DefaultImageTransformer extends ImageTransformer {
   }
 
   @override
-  ScaleInfo getScaledFileInfo(File file, int width, int height) {
+  ScaleInfo getScaledFileInfo(File file, int? width, int? height) {
     final format = _getCompressionFormat(file);
 
     final directory = file.parent;
@@ -82,18 +83,18 @@ class DefaultImageTransformer extends ImageTransformer {
         "/" +
         p.basenameWithoutExtension(file.path) +
         sprintf(tmpFileSuffix, [width ?? 1, height ?? 1]) +
-        _extensionFormats[format];
+        _extensionFormats[format]!;
     final scaleFile = File(destPath);
     return ScaleInfo(scaleFile, width ?? 1, height ?? 1, format);
   }
 
   CompressFormat _getCompressionFormat(File file) {
-    String extension = p.extension(file.path) ?? '';
+    String extension = p.extension(file.path);
     return _compressionFormats[extension] ?? CompressFormat.png;
   }
 }
 
 abstract class ImageTransformer {
-  Future<FileInfo> transform(FileInfo info, int width, int height);
+  Future<FileInfo> transform(FileInfo info, int? width, int? height);
   ScaleInfo getScaledFileInfo(File file, int width, int height);
 }
diff --git a/pubspec.yaml b/pubspec.yaml
index a18377e..660f8b8 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,10 +1,10 @@
 name: optimized_cached_image
 description: A library for loading images from network, resizing as per container size and caching while being memory sensitive.
-version: 2.0.2-alpha
+version: 3.0.0
 homepage: https://github.com/humblerookie/optimized_cached_image
 
 environment:
-  sdk: ">=2.6.2 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 dependencies:
   flutter:
     sdk: flutter