diff --git a/.idea/libraries/Dart_SDK.xml b/.idea/libraries/Dart_SDK.xml
index e0754ad..3dccf65 100644
--- a/.idea/libraries/Dart_SDK.xml
+++ b/.idea/libraries/Dart_SDK.xml
@@ -1,25 +1,26 @@
 <component name="libraryTable">
   <library name="Dart SDK">
     <CLASSES>
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/async" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/cli" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/collection" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/convert" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/core" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/developer" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/ffi" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/html" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/indexed_db" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/io" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/isolate" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/js" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/js_util" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/math" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/mirrors" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/svg" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/typed_data" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/web_audio" />
-      <root url="file://$PROJECT_DIR$/../../flutter/flutter/bin/cache/dart-sdk/lib/web_gl" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/async" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/cli" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/collection" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/convert" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/core" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/developer" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/ffi" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/html" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/indexed_db" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/io" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/isolate" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/js" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/js_interop" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/js_util" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/math" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/mirrors" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/svg" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/typed_data" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/web_audio" />
+      <root url="file://$PROJECT_DIR$/../flutter/bin/cache/dart-sdk/lib/web_gl" />
     </CLASSES>
     <JAVADOC />
     <SOURCES />
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 4d87bb8..45f185d 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -7,27 +7,22 @@
     <option name="autoReloadType" value="NONE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="fd7b0e68-9cc0-4a72-b80e-82ac973029f1" name="Default Changelist" comment="">
+    <list default="true" id="fd7b0e68-9cc0-4a72-b80e-82ac973029f1" name="Default Changelist" comment="temp submit">
       <change beforePath="$PROJECT_DIR$/.idea/libraries/Dart_SDK.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/libraries/Dart_SDK.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/misc.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/misc.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/CHANGELOG.md" beforeDir="false" afterPath="$PROJECT_DIR$/CHANGELOG.md" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/android/build.gradle" beforeDir="false" afterPath="$PROJECT_DIR$/android/build.gradle" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/android/src/main/java/com/smallbuer/flutter_aes_ecb_pkcs5/AesSecurity.java" beforeDir="false" afterPath="$PROJECT_DIR$/android/src/main/java/com/smallbuer/flutter_aes_ecb_pkcs5/AesSecurity.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/android/src/main/java/com/smallbuer/flutter_aes_ecb_pkcs5/FlutterAesEcbPkcs5Plugin.java" beforeDir="false" afterPath="$PROJECT_DIR$/android/src/main/java/com/smallbuer/flutter_aes_ecb_pkcs5/FlutterAesEcbPkcs5Plugin.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/example/android/app/build.gradle" beforeDir="false" afterPath="$PROJECT_DIR$/example/android/app/build.gradle" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/example/android/app/src/main/AndroidManifest.xml" beforeDir="false" afterPath="$PROJECT_DIR$/example/android/app/src/main/AndroidManifest.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/example/android/app/src/main/java/com/smallbuer/flutter_aes_ecb_pkcs5_example/MainActivity.java" beforeDir="false" afterPath="$PROJECT_DIR$/example/android/app/src/main/java/com/smallbuer/flutter_aes_ecb_pkcs5_example/MainActivity.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/example/android/build.gradle" beforeDir="false" afterPath="$PROJECT_DIR$/example/android/build.gradle" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/example/android/gradle/wrapper/gradle-wrapper.properties" beforeDir="false" afterPath="$PROJECT_DIR$/example/android/gradle/wrapper/gradle-wrapper.properties" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/example/lib/main.dart" beforeDir="false" afterPath="$PROJECT_DIR$/example/lib/main.dart" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/example/pubspec.lock" beforeDir="false" afterPath="$PROJECT_DIR$/example/pubspec.lock" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/example/pubspec.yaml" beforeDir="false" afterPath="$PROJECT_DIR$/example/pubspec.yaml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/flutter_aes_ecb_pkcs5.iml" beforeDir="false" afterPath="$PROJECT_DIR$/flutter_aes_ecb_pkcs5.iml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/lib/flutter_aes_ecb_pkcs5.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/flutter_aes_ecb_pkcs5.dart" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/pubspec.lock" beforeDir="false" afterPath="$PROJECT_DIR$/pubspec.lock" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/pubspec.yaml" beforeDir="false" afterPath="$PROJECT_DIR$/pubspec.yaml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/test/flutter_aes_ecb_pkcs5_test.dart" beforeDir="false" afterPath="$PROJECT_DIR$/test/flutter_aes_ecb_pkcs5_test.dart" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -37,7 +32,6 @@
   <component name="DefaultGradleProjectSettings">
     <option name="isMigrated" value="true" />
   </component>
-  <component name="ExecutionTargetManager" SELECTED_TARGET="device_and_snapshot_combo_box_target[]" />
   <component name="FindInProjectRecents">
     <findStrings>
       <find>FlutterEncryptAesEcbPkcs5Plugin</find>
@@ -67,6 +61,9 @@
       </list>
     </option>
   </component>
+  <component name="KotlinMultiplatform">
+    <allAvailableExecutables />
+  </component>
   <component name="ProjectFrameBounds">
     <option name="y" value="23" />
     <option name="width" value="1440" />
@@ -100,12 +97,16 @@
     <option name="showLibraryContents" value="true" />
   </component>
   <component name="PropertiesComponent">
+    <property name="RunOnceActivity.OpenProjectViewOnStart" value="true" />
+    <property name="RunOnceActivity.ShowReadmeOnStart" value="true" />
+    <property name="RunOnceActivity.cidr.known.project.marker" value="true" />
     <property name="SHARE_PROJECT_CONFIGURATION_FILES" value="true" />
+    <property name="cidr.known.project.marker" value="true" />
     <property name="dart.analysis.tool.window.force.activate" value="false" />
     <property name="dart.analysis.tool.window.visible" value="false" />
     <property name="io.flutter.reload.alreadyRun" value="true" />
-    <property name="last_opened_file_path" value="$PROJECT_DIR$" />
-    <property name="project.structure.last.edited" value="Variables" />
+    <property name="last_opened_file_path" value="$PROJECT_DIR$/../flutter_app" />
+    <property name="project.structure.last.edited" value="Modules" />
     <property name="project.structure.proportion" value="0.15" />
     <property name="project.structure.side.proportion" value="0.2" />
     <property name="settings.editor.selected.configurable" value="project.propVCSSupport.Mappings" />
@@ -173,6 +174,48 @@
   <component name="UnknownFeatures">
     <option featureType="com.intellij.fileTypeFactory" implementationName="*.md" />
   </component>
+  <component name="Vcs.Log.Tabs.Properties">
+    <option name="TAB_STATES">
+      <map>
+        <entry key="1">
+          <value>
+            <State>
+              <option name="SHOW_ONLY_AFFECTED_CHANGES" value="true" />
+              <option name="FILTERS">
+                <map>
+                  <entry key="branch">
+                    <value>
+                      <list>
+                        <option value="HEAD" />
+                      </list>
+                    </value>
+                  </entry>
+                  <entry key="roots">
+                    <value>
+                      <list>
+                        <option value="$PROJECT_DIR$" />
+                      </list>
+                    </value>
+                  </entry>
+                </map>
+              </option>
+            </State>
+          </value>
+        </entry>
+        <entry key="MAIN">
+          <value>
+            <State />
+          </value>
+        </entry>
+      </map>
+    </option>
+    <option name="OPEN_GENERIC_TABS">
+      <map>
+        <entry key="1" value="TOOL_WINDOW" />
+      </map>
+    </option>
+    <option name="oldMeFiltersMigrated" value="true" />
+  </component>
   <component name="VcsManagerConfiguration">
     <MESSAGE value="add code comments" />
     <option name="LAST_COMMIT_MESSAGE" value="add code comments" />
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 212a2bb..326cf70 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,4 +16,9 @@
 ## 0.1.2
 * update Flutter SDK is 2.x.
 * support null safety
-* update android gradle version 4.x
\ No newline at end of file
+* update android gradle version 4.x
+
+## 0.1.3
+* update Flutter SDK is 3.x.
+* support null safety
+* update android gradle version 7.x
\ No newline at end of file
diff --git a/android/build.gradle b/android/build.gradle
index b94ceac..86d411e 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -8,7 +8,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.0'
+        classpath 'com.android.tools.build:gradle:4.1.3'
     }
 }
 
diff --git a/android/src/main/java/com/smallbuer/flutter_aes_ecb_pkcs5/AesSecurity.java b/android/src/main/java/com/smallbuer/flutter_aes_ecb_pkcs5/AesSecurity.java
old mode 100755
new mode 100644
diff --git a/example/android/app/build.gradle b/example/android/app/build.gradle
index 9361d73..b9bf7be 100644
--- a/example/android/app/build.gradle
+++ b/example/android/app/build.gradle
@@ -22,28 +22,28 @@ if (flutterVersionName == null) {
 }
 
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
+    namespace "com.smallbuer.flutter_aes_ecb_pkcs5_example"
     compileSdkVersion flutter.compileSdkVersion
+    ndkVersion flutter.ndkVersion
 
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
 
-    lintOptions {
-        disable 'InvalidPackage'
-    }
-
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId "com.smallbuer.flutter_aes_ecb_pkcs5_example"
+        applicationId "com.example.untitled2_example"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
         minSdkVersion flutter.minSdkVersion
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
 
     buildTypes {
@@ -59,8 +59,3 @@ flutter {
     source '../..'
 }
 
-dependencies {
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'com.android.support.test:runner:1.0.2'
-    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
-}
diff --git a/example/android/app/src/main/AndroidManifest.xml b/example/android/app/src/main/AndroidManifest.xml
index 57d995b..9a6103e 100644
--- a/example/android/app/src/main/AndroidManifest.xml
+++ b/example/android/app/src/main/AndroidManifest.xml
@@ -7,11 +7,12 @@
          additional functionality it is fine to subclass or reimplement
          FlutterApplication and put your custom class here. -->
     <application
-        android:name="io.flutter.app.FlutterApplication"
+        android:name="${applicationName}"
         android:label="flutter_aes_ecb_pkcs5_example"
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"
+            android:exported="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
@@ -30,5 +31,10 @@
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
+        <!-- Don't delete the meta-data below.
+     This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
     </application>
 </manifest>
diff --git a/example/android/build.gradle b/example/android/build.gradle
index 0b4cf53..f7eb7f6 100644
--- a/example/android/build.gradle
+++ b/example/android/build.gradle
@@ -1,11 +1,13 @@
 buildscript {
+    ext.kotlin_version = '1.7.10'
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.0'
+        classpath 'com.android.tools.build:gradle:7.3.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
 
@@ -24,6 +26,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }
diff --git a/example/android/gradle/wrapper/gradle-wrapper.properties b/example/android/gradle/wrapper/gradle-wrapper.properties
index 3fcc9eb..0bc3d49 100644
--- a/example/android/gradle/wrapper/gradle-wrapper.properties
+++ b/example/android/gradle/wrapper/gradle-wrapper.properties
@@ -3,5 +3,5 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-all.zip
 
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 572c290..ef8a899 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -30,19 +30,20 @@ class _MyAppState extends State<MyApp> {
     var key = await FlutterAesEcbPkcs5.generateDesKey(128);
 
     print(key);
+
     //encrypt
-    var encryptText = await FlutterAesEcbPkcs5.encryptString(data, key);
+    var encryptText = await FlutterAesEcbPkcs5.encryptString(data,key!);
 
     print(encryptText);
     //decrypt
-    var decryptText  = await FlutterAesEcbPkcs5.decryptString(encryptText, key);
+    var decryptText  = await FlutterAesEcbPkcs5.decryptString(encryptText!, key);
 
     print(decryptText);
 
     pkcs5Progress = "data:"+data +"\n"+
         "create key:"+key +"\n"
         +"encryptText :"+encryptText +"\n"
-        +"decryptText :"+decryptText +"\n";
+        +"decryptText :"+decryptText! +"\n";
 
     print(pkcs5Progress);
     // If the widget was removed from the tree while the asynchronous platform
diff --git a/example/pubspec.lock b/example/pubspec.lock
index 12ad890..c4941a8 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -5,58 +5,58 @@ packages:
     dependency: transitive
     description:
       name: async
-      url: "https://pub.dartlang.org"
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.8.2"
+    version: "2.11.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
-      url: "https://pub.dartlang.org"
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   characters:
     dependency: transitive
     description:
       name: characters
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
+      sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.3.1"
+    version: "1.3.0"
   clock:
     dependency: transitive
     description:
       name: clock
-      url: "https://pub.dartlang.org"
+      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   collection:
     dependency: transitive
     description:
       name: collection
-      url: "https://pub.dartlang.org"
+      sha256: "4a07be6cb69c84d677a6c3096fcf960cc3285a8330b4603e0d463d15d9bd934c"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.15.0"
+    version: "1.17.1"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
-      url: "https://pub.dartlang.org"
+      sha256: e35129dc44c9118cee2a5603506d823bab99c68393879edb440e0090d07586be
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.0.4"
+    version: "1.0.5"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
-      url: "https://pub.dartlang.org"
+      sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -68,33 +68,65 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.1.1"
+    version: "0.1.2"
   flutter_test:
     dependency: "direct dev"
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.6.7"
   matcher:
     dependency: transitive
     description:
       name: matcher
-      url: "https://pub.dartlang.org"
+      sha256: "6501fbd55da300384b768785b83e5ce66991266cec21af89ab9ae7f5ce1c4cbb"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.12.15"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      sha256: d92141dc6fe1dad30722f9aa826c7fbc896d021d792f80678280601aff8cf724
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.12.11"
+    version: "0.2.0"
   meta:
     dependency: transitive
     description:
       name: meta
-      url: "https://pub.dartlang.org"
+      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.7.0"
+    version: "1.9.1"
   path:
     dependency: transitive
     description:
       name: path
-      url: "https://pub.dartlang.org"
+      sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.3"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      sha256: "6a2128648c854906c53fa8e33986fc0247a1116122f9534dd20e3ab9e16a32bc"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.4"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -104,58 +136,58 @@ packages:
     dependency: transitive
     description:
       name: source_span
-      url: "https://pub.dartlang.org"
+      sha256: dd904f795d4b4f3b870833847c461801f6750a9fa8e61ea5ac53f9422b31f250
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.8.1"
+    version: "1.9.1"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      url: "https://pub.dartlang.org"
+      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.10.0"
+    version: "1.11.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
-      url: "https://pub.dartlang.org"
+      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
-      url: "https://pub.dartlang.org"
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
-      url: "https://pub.dartlang.org"
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.2.0"
+    version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      url: "https://pub.dartlang.org"
+      sha256: eb6ac1540b26de412b3403a163d919ba86f6a973fe6cc50ae3541b80092fdcfb
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.4.3"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.0"
+    version: "0.5.1"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
-      url: "https://pub.dartlang.org"
+      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.4"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
-  flutter: ">=1.17.0"
+  dart: ">=3.0.3 <4.0.0"
+  flutter: ">=3.3.0"
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 733cccb..311133a 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -3,7 +3,7 @@ description: Demonstrates how to use the flutter_aes_ecb_pkcs5 plugin.
 
 
 environment:
-  sdk: ">=2.1.0 <3.0.0"
+  sdk: '>=3.0.3 <4.0.0'
 
 dependencies:
   flutter:
diff --git a/pubspec.lock b/pubspec.lock
index b00c10b..a9f5f05 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1,385 +1,194 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
-  _fe_analyzer_shared:
-    dependency: transitive
-    description:
-      name: _fe_analyzer_shared
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "31.0.0"
-  analyzer:
-    dependency: transitive
-    description:
-      name: analyzer
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.8.0"
-  args:
-    dependency: transitive
-    description:
-      name: args
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.3.0"
   async:
     dependency: transitive
     description:
       name: async
-      url: "https://pub.dartlang.org"
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.8.2"
+    version: "2.11.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
-      url: "https://pub.dartlang.org"
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   characters:
     dependency: transitive
     description:
       name: characters
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
+      sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.3.1"
-  cli_util:
-    dependency: transitive
-    description:
-      name: cli_util
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.3.5"
+    version: "1.3.0"
   clock:
     dependency: transitive
     description:
       name: clock
-      url: "https://pub.dartlang.org"
+      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   collection:
     dependency: transitive
     description:
       name: collection
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.15.0"
-  convert:
-    dependency: transitive
-    description:
-      name: convert
-      url: "https://pub.dartlang.org"
+      sha256: "4a07be6cb69c84d677a6c3096fcf960cc3285a8330b4603e0d463d15d9bd934c"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "3.0.1"
-  coverage:
-    dependency: transitive
-    description:
-      name: coverage
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.3"
-  crypto:
-    dependency: transitive
-    description:
-      name: crypto
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "3.0.1"
+    version: "1.17.1"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
-  file:
-    dependency: transitive
-    description:
-      name: file
-      url: "https://pub.dartlang.org"
+      sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "6.1.2"
+    version: "1.3.1"
   flutter:
     dependency: "direct main"
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      sha256: aeb0b80a8b3709709c9cc496cdc027c5b3216796bc0af0ce1007eaf24464fd4c
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.0.1"
   flutter_test:
     dependency: "direct dev"
     description: flutter
     source: sdk
     version: "0.0.0"
-  frontend_server_client:
-    dependency: transitive
-    description:
-      name: frontend_server_client
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.2"
-  glob:
-    dependency: transitive
-    description:
-      name: glob
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.2"
-  http_multi_server:
-    dependency: transitive
-    description:
-      name: http_multi_server
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "3.0.1"
-  http_parser:
-    dependency: transitive
-    description:
-      name: http_parser
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "4.0.0"
-  io:
-    dependency: transitive
-    description:
-      name: io
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.3"
+  flutter_web_plugins:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   js:
     dependency: transitive
     description:
       name: js
-      url: "https://pub.dartlang.org"
+      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.6.3"
-  logging:
+    version: "0.6.7"
+  lints:
     dependency: transitive
     description:
-      name: logging
-      url: "https://pub.dartlang.org"
+      name: lints
+      sha256: "0a217c6c989d21039f1498c3ed9f3ed71b354e69873f13a8dfc3c9fe76f1b452"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.0.2"
+    version: "2.1.1"
   matcher:
     dependency: transitive
     description:
       name: matcher
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.12.11"
-  meta:
-    dependency: transitive
-    description:
-      name: meta
-      url: "https://pub.dartlang.org"
+      sha256: "6501fbd55da300384b768785b83e5ce66991266cec21af89ab9ae7f5ce1c4cbb"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.7.0"
-  mime:
+    version: "0.12.15"
+  material_color_utilities:
     dependency: transitive
     description:
-      name: mime
-      url: "https://pub.dartlang.org"
+      name: material_color_utilities
+      sha256: d92141dc6fe1dad30722f9aa826c7fbc896d021d792f80678280601aff8cf724
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.0.1"
-  node_preamble:
-    dependency: transitive
-    description:
-      name: node_preamble
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.1"
-  package_config:
+    version: "0.2.0"
+  meta:
     dependency: transitive
     description:
-      name: package_config
-      url: "https://pub.dartlang.org"
+      name: meta
+      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.0.2"
+    version: "1.9.1"
   path:
     dependency: transitive
     description:
       name: path
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.8.0"
-  pedantic:
-    dependency: transitive
-    description:
-      name: pedantic
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.11.1"
-  pool:
-    dependency: transitive
-    description:
-      name: pool
-      url: "https://pub.dartlang.org"
+      sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.5.0"
-  pub_semver:
-    dependency: transitive
-    description:
-      name: pub_semver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.0"
-  shelf:
-    dependency: transitive
-    description:
-      name: shelf
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
-  shelf_packages_handler:
-    dependency: transitive
-    description:
-      name: shelf_packages_handler
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "3.0.0"
-  shelf_static:
-    dependency: transitive
-    description:
-      name: shelf_static
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.0"
-  shelf_web_socket:
-    dependency: transitive
+    version: "1.8.3"
+  plugin_platform_interface:
+    dependency: "direct main"
     description:
-      name: shelf_web_socket
-      url: "https://pub.dartlang.org"
+      name: plugin_platform_interface
+      sha256: "6a2128648c854906c53fa8e33986fc0247a1116122f9534dd20e3ab9e16a32bc"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.0.1"
+    version: "2.1.4"
   sky_engine:
     dependency: transitive
     description: flutter
     source: sdk
     version: "0.0.99"
-  source_map_stack_trace:
-    dependency: transitive
-    description:
-      name: source_map_stack_trace
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.0"
-  source_maps:
-    dependency: transitive
-    description:
-      name: source_maps
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.10.10"
   source_span:
     dependency: transitive
     description:
       name: source_span
-      url: "https://pub.dartlang.org"
+      sha256: dd904f795d4b4f3b870833847c461801f6750a9fa8e61ea5ac53f9422b31f250
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.8.1"
+    version: "1.9.1"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      url: "https://pub.dartlang.org"
+      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.10.0"
+    version: "1.11.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
-      url: "https://pub.dartlang.org"
+      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
-      url: "https://pub.dartlang.org"
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
-  test:
-    dependency: "direct dev"
-    description:
-      name: test
-      url: "https://pub.dartlang.org"
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.17.12"
+    version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      url: "https://pub.dartlang.org"
+      sha256: eb6ac1540b26de412b3403a163d919ba86f6a973fe6cc50ae3541b80092fdcfb
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.4.3"
-  test_core:
-    dependency: transitive
-    description:
-      name: test_core
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.4.2"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.0"
+    version: "0.5.1"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.1"
-  vm_service:
-    dependency: transitive
-    description:
-      name: vm_service
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "7.5.0"
-  watcher:
-    dependency: transitive
-    description:
-      name: watcher
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.1"
-  web_socket_channel:
-    dependency: transitive
-    description:
-      name: web_socket_channel
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.0"
-  webkit_inspection_protocol:
-    dependency: transitive
-    description:
-      name: webkit_inspection_protocol
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.0"
-  yaml:
-    dependency: transitive
-    description:
-      name: yaml
-      url: "https://pub.dartlang.org"
+      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "3.1.0"
+    version: "2.1.4"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
-  flutter: ">=1.17.0"
+  dart: ">=3.0.3 <4.0.0"
+  flutter: ">=3.3.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 29ab019..375af86 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,20 +1,24 @@
 name: flutter_aes_ecb_pkcs5
 description: A flutter plugin, a library dedicated to aes_ecb_pkcs5 encryption and decryption, it has high performance and a simple API, small size and stable operation;
-version: 0.1.2
+version: 0.1.3
 homepage: https://github.com/smallbuer/flutter_aes_ecb_pkcs5.git
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
-  flutter: ">=1.17.0"
+  sdk: '>=3.0.3 <4.0.0'
+  flutter: ">=3.3.0"
 
 dependencies:
   flutter:
     sdk: flutter
+  flutter_web_plugins:
+    sdk: flutter
+  plugin_platform_interface: ^2.0.2
 
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  test: ^1.17.12
+  flutter_lints: ^2.0.0
+
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec
diff --git a/test/flutter_aes_ecb_pkcs5_test.dart b/test/flutter_aes_ecb_pkcs5_test.dart
index 8152740..30ff6a9 100644
--- a/test/flutter_aes_ecb_pkcs5_test.dart
+++ b/test/flutter_aes_ecb_pkcs5_test.dart
@@ -1,21 +1,22 @@
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:flutter_aes_ecb_pkcs5/flutter_aes_ecb_pkcs5.dart';
 
 void main() {
+
   const MethodChannel channel = MethodChannel('flutter_aes_ecb_pkcs5');
 
   setUp(() {
-    channel.setMockMethodCallHandler((MethodCall methodCall) async {
-      return '42';
-    });
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
+      channel,
+          (MethodCall methodCall) async {
+        return '42';
+      },
+    );
   });
 
   tearDown(() {
-    channel.setMockMethodCallHandler(null);
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(channel, null);
   });
 
-  test('getPlatformVersion', () async {
-    expect(await FlutterAesEcbPkcs5.platformVersion, '42');
-  });
+
 }