diff --git a/analysis_options.yaml b/analysis_options.yaml
index 6b54c54..a948add 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -35,7 +35,6 @@ analyzer:
     # Ignore analyzer hints for updating pubspecs when using Future or
     # Stream and not importing dart:async
     # Please see https://github.com/flutter/flutter/pull/24528 for details.
-    sdk_version_async_exported_from_core: ignore
   exclude:
     - "bin/cache/**"
     # the following two are relative to the stocks example and the flutter package respectively
diff --git a/example/android/build.gradle b/example/android/build.gradle
index 58a8c74..cc1d40f 100644
--- a/example/android/build.gradle
+++ b/example/android/build.gradle
@@ -26,6 +26,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
-    delete rootProject.buildDir
+tasks.register("clean", Delete) {
+    delete rootProject.layout.buildDirectory
 }
diff --git a/pubspec.yaml b/pubspec.yaml
index d349bec..180f366 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -19,7 +19,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  flutter_pdfview: ">=1.0.0 <2.0.0"
+  flutter_pdfview: ">=1.4.3 <4.0.0"
   flutter_cache_manager: ">=3.0.0 <4.0.0"
   path_provider: ">=2.0.0 <3.0.0"
   path: ">=1.0.0 <2.0.0"
@@ -27,4 +27,4 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
-flutter:
+flutter:
\ No newline at end of file