diff --git a/android/.idea/appInsightsSettings.xml b/android/.idea/appInsightsSettings.xml
new file mode 100644
index 0000000..624203b
--- /dev/null
+++ b/android/.idea/appInsightsSettings.xml
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AppInsightsSettings">
+    <option name="tabSettings">
+      <map>
+        <entry key="Android Vitals">
+          <value>
+            <InsightsFilterSettings>
+              <option name="connection">
+                <ConnectionSetting>
+                  <option name="appId" value="com.arakitech.leanbackdemo" />
+                </ConnectionSetting>
+              </option>
+              <option name="failureTypes">
+                <list>
+                  <option value="FATAL" />
+                </list>
+              </option>
+              <option name="signal" value="SIGNAL_UNSPECIFIED" />
+              <option name="timeIntervalDays" value="SEVEN_DAYS" />
+              <option name="visibilityType" value="ALL" />
+            </InsightsFilterSettings>
+          </value>
+        </entry>
+        <entry key="Firebase Crashlytics">
+          <value>
+            <InsightsFilterSettings>
+              <option name="connection">
+                <ConnectionSetting>
+                  <option name="appId" value="PLACEHOLDER" />
+                  <option name="mobileSdkAppId" value="" />
+                  <option name="projectId" value="" />
+                  <option name="projectNumber" value="" />
+                </ConnectionSetting>
+              </option>
+              <option name="signal" value="SIGNAL_UNSPECIFIED" />
+              <option name="timeIntervalDays" value="THIRTY_DAYS" />
+              <option name="visibilityType" value="ALL" />
+            </InsightsFilterSettings>
+          </value>
+        </entry>
+      </map>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/android/.idea/codeStyles/Project.xml b/android/.idea/codeStyles/Project.xml
index ace66b2..6a6f4b9 100644
--- a/android/.idea/codeStyles/Project.xml
+++ b/android/.idea/codeStyles/Project.xml
@@ -6,17 +6,6 @@
           <package name="kotlinx.android.synthetic" alias="false" withSubpackages="true" />
         </value>
       </option>
-      <option name="PACKAGES_IMPORT_LAYOUT">
-        <value>
-          <package name="" alias="false" withSubpackages="true" />
-          <package name="java" alias="false" withSubpackages="true" />
-          <package name="javax" alias="false" withSubpackages="true" />
-          <package name="kotlin" alias="false" withSubpackages="true" />
-          <package name="" alias="true" withSubpackages="true" />
-        </value>
-      </option>
-      <option name="NAME_COUNT_TO_USE_STAR_IMPORT" value="2147483647" />
-      <option name="NAME_COUNT_TO_USE_STAR_IMPORT_FOR_MEMBERS" value="2147483647" />
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
     </JetCodeStyleSettings>
     <XML>
diff --git a/android/.idea/compiler.xml b/android/.idea/compiler.xml
index fb7f4a8..b589d56 100644
--- a/android/.idea/compiler.xml
+++ b/android/.idea/compiler.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="11" />
+    <bytecodeTargetLevel target="17" />
   </component>
 </project>
\ No newline at end of file
diff --git a/android/.idea/deploymentTargetDropDown.xml b/android/.idea/deploymentTargetDropDown.xml
new file mode 100644
index 0000000..5296be1
--- /dev/null
+++ b/android/.idea/deploymentTargetDropDown.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="deploymentTargetDropDown">
+    <value>
+      <entry key="app">
+        <State />
+      </entry>
+      <entry key="app-start">
+        <State />
+      </entry>
+    </value>
+  </component>
+</project>
\ No newline at end of file
diff --git a/android/.idea/gradle.xml b/android/.idea/gradle.xml
index 9876a12..54f23ef 100644
--- a/android/.idea/gradle.xml
+++ b/android/.idea/gradle.xml
@@ -4,10 +4,8 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
-        <option name="testRunner" value="GRADLE" />
-        <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleJvm" value="Embedded JDK" />
+        <option name="gradleJvm" value="#GRADLE_LOCAL_JAVA_HOME" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
@@ -15,7 +13,7 @@
             <option value="$PROJECT_DIR$/app-start" />
           </set>
         </option>
-        <option name="resolveModulePerSourceSet" value="false" />
+        <option name="resolveExternalAnnotations" value="false" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/android/.idea/kotlinc.xml b/android/.idea/kotlinc.xml
new file mode 100644
index 0000000..9a55c2d
--- /dev/null
+++ b/android/.idea/kotlinc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="KotlinJpsPluginSettings">
+    <option name="version" value="1.8.22" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/android/.idea/migrations.xml b/android/.idea/migrations.xml
new file mode 100644
index 0000000..f8051a6
--- /dev/null
+++ b/android/.idea/migrations.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectMigrations">
+    <option name="MigrateToGradleLocalJavaHome">
+      <set>
+        <option value="$PROJECT_DIR$" />
+      </set>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/android/.idea/misc.xml b/android/.idea/misc.xml
index 6199cc2..55c0ec2 100644
--- a/android/.idea/misc.xml
+++ b/android/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="11" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="jbr-17" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/android/app-start/build.gradle b/android/app-start/build.gradle
index 9874334..4266f74 100644
--- a/android/app-start/build.gradle
+++ b/android/app-start/build.gradle
@@ -20,35 +20,46 @@ apply plugin: 'kotlin-kapt'
 apply plugin: 'dagger.hilt.android.plugin'
 
 android {
-    compileSdkVersion 30
+    namespace 'com.example.android.fido2'
+    compileSdk 33
     defaultConfig {
         applicationId 'com.example.android.fido2'
-        minSdkVersion 21
-        targetSdkVersion 30
+        minSdk 21
+        targetSdk 33
         versionCode 1
         versionName '1.0'
         testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
         vectorDrawables.useSupportLibrary = true
-        buildConfigField 'String', 'API_BASE_URL', "\"${getProperty('host')}/auth\""
-        resValue 'string', 'host', getProperty('host')
+        buildConfigField 'String', 'API_BASE_URL', "\"https://webauthn-codelab.glitch.me/auth\""
+        resValue 'string', 'host', 'https://webauthn-codelab.glitch.me'
         resValue 'string', 'asset_statements', """
            [{
-             "include": "${getProperty('host')}/.well-known/assetlinks.json"
+             "include": "https://webauthn-codelab.glitch.me/.well-known/assetlinks.json"
            }]
         """
     }
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+    signingConfigs {
+        debug {
+            storeFile file('../debug.jks')
+            storePassword 'android'
+            keyAlias 'androiddebugkey'
+            keyPassword 'android'
+        }
     }
-    kotlinOptions {
-        jvmTarget = '1.8'
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
     }
     buildFeatures {
         dataBinding true
+        buildConfig = true
     }
     buildTypes {
+        debug {
+            signingConfig signingConfigs.debug
+        }
         release {
+            signingConfig signingConfigs.debug
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
@@ -58,46 +69,46 @@ android {
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 
-    implementation 'com.google.android.gms:play-services-fido:19.0.0-beta'
+    implementation 'com.google.android.gms:play-services-fido:20.0.1'
 
-    implementation 'androidx.appcompat:appcompat:1.3.1'
-    implementation 'androidx.fragment:fragment-ktx:1.3.6'
+    implementation 'androidx.appcompat:appcompat:1.6.1'
+    implementation 'androidx.fragment:fragment-ktx:1.6.0'
 
-    implementation 'androidx.core:core-ktx:1.6.0'
-    implementation 'androidx.constraintlayout:constraintlayout:2.1.0'
+    implementation 'androidx.core:core-ktx:1.10.1'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
 
     implementation "androidx.datastore:datastore-preferences:1.0.0"
 
-    def coroutine_version = '1.5.0'
+    def coroutine_version = '1.7.1'
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutine_version"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutine_version"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-play-services:$coroutine_version"
 
-    def hilt_version = '2.38.1'
+    def hilt_version = '2.47'
     implementation "com.google.dagger:hilt-android:$hilt_version"
     kapt "com.google.dagger:hilt-compiler:$hilt_version"
     kapt "androidx.hilt:hilt-compiler:1.0.0"
 
-    def lifecycle_version = '2.4.0-alpha03'
+    def lifecycle_version = '2.6.1'
     implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
     implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"
     implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
-    testImplementation 'androidx.arch.core:core-testing:2.1.0'
+    testImplementation 'androidx.arch.core:core-testing:2.2.0'
 
-    implementation 'com.google.android.material:material:1.4.0'
+    implementation 'com.google.android.material:material:1.9.0'
 
-    def okhttp_version = '4.9.0'
+    def okhttp_version = '4.11.0'
     implementation "com.squareup.okhttp3:okhttp:$okhttp_version"
     implementation "com.squareup.okhttp3:logging-interceptor:$okhttp_version"
     implementation "ru.gildor.coroutines:kotlin-coroutines-okhttp:1.0"
 
     testImplementation 'junit:junit:4.13.2'
-    androidTestImplementation 'androidx.test:runner:1.4.0'
-    androidTestImplementation 'androidx.test:rules:1.4.0'
+    androidTestImplementation 'androidx.test:runner:1.5.2'
+    androidTestImplementation 'androidx.test:rules:1.5.0'
 
-    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
-    androidTestImplementation 'androidx.test.ext:truth:1.4.0'
-    androidTestImplementation 'com.google.truth:truth:1.1.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
+    androidTestImplementation 'androidx.test.ext:truth:1.5.0'
+    androidTestImplementation 'com.google.truth:truth:1.1.3'
 
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
 }
diff --git a/android/app-start/src/main/AndroidManifest.xml b/android/app-start/src/main/AndroidManifest.xml
index 2744acd..8a01677 100644
--- a/android/app-start/src/main/AndroidManifest.xml
+++ b/android/app-start/src/main/AndroidManifest.xml
@@ -37,6 +37,7 @@
 
         <activity
             android:name=".ui.MainActivity"
+            android:exported="true"
             android:windowSoftInputMode="stateUnchanged|adjustResize">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
diff --git a/android/app-start/src/main/java/com/example/android/fido2/api/AuthApi.kt b/android/app-start/src/main/java/com/example/android/fido2/api/AuthApi.kt
index 1e4cc23..2670c86 100644
--- a/android/app-start/src/main/java/com/example/android/fido2/api/AuthApi.kt
+++ b/android/app-start/src/main/java/com/example/android/fido2/api/AuthApi.kt
@@ -401,7 +401,7 @@ class AuthApi @Inject constructor(
         return PublicKeyCredentialUserEntity(
             id!!.decodeBase64(),
             name!!,
-            null, // icon
+            "", // icon
             displayName
         )
     }
diff --git a/android/app/build.gradle b/android/app/build.gradle
index 1443938..4266f74 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -20,11 +20,12 @@ apply plugin: 'kotlin-kapt'
 apply plugin: 'dagger.hilt.android.plugin'
 
 android {
-    compileSdkVersion 30
+    namespace 'com.example.android.fido2'
+    compileSdk 33
     defaultConfig {
         applicationId 'com.example.android.fido2'
-        minSdkVersion 21
-        targetSdkVersion 30
+        minSdk 21
+        targetSdk 33
         versionCode 1
         versionName '1.0'
         testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
@@ -46,14 +47,12 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
-    }
-    kotlinOptions {
-        jvmTarget = '1.8'
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
     }
     buildFeatures {
         dataBinding true
+        buildConfig = true
     }
     buildTypes {
         debug {
@@ -70,46 +69,46 @@ android {
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 
-    implementation 'com.google.android.gms:play-services-fido:19.0.0-beta'
+    implementation 'com.google.android.gms:play-services-fido:20.0.1'
 
-    implementation 'androidx.appcompat:appcompat:1.3.1'
-    implementation 'androidx.fragment:fragment-ktx:1.3.6'
+    implementation 'androidx.appcompat:appcompat:1.6.1'
+    implementation 'androidx.fragment:fragment-ktx:1.6.0'
 
-    implementation 'androidx.core:core-ktx:1.6.0'
-    implementation 'androidx.constraintlayout:constraintlayout:2.1.0'
+    implementation 'androidx.core:core-ktx:1.10.1'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
 
     implementation "androidx.datastore:datastore-preferences:1.0.0"
 
-    def coroutine_version = '1.5.0'
+    def coroutine_version = '1.7.1'
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutine_version"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutine_version"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-play-services:$coroutine_version"
 
-    def hilt_version = '2.38.1'
+    def hilt_version = '2.47'
     implementation "com.google.dagger:hilt-android:$hilt_version"
     kapt "com.google.dagger:hilt-compiler:$hilt_version"
     kapt "androidx.hilt:hilt-compiler:1.0.0"
 
-    def lifecycle_version = '2.4.0-alpha03'
+    def lifecycle_version = '2.6.1'
     implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
     implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"
     implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
-    testImplementation 'androidx.arch.core:core-testing:2.1.0'
+    testImplementation 'androidx.arch.core:core-testing:2.2.0'
 
-    implementation 'com.google.android.material:material:1.4.0'
+    implementation 'com.google.android.material:material:1.9.0'
 
-    def okhttp_version = '4.9.0'
+    def okhttp_version = '4.11.0'
     implementation "com.squareup.okhttp3:okhttp:$okhttp_version"
     implementation "com.squareup.okhttp3:logging-interceptor:$okhttp_version"
     implementation "ru.gildor.coroutines:kotlin-coroutines-okhttp:1.0"
 
     testImplementation 'junit:junit:4.13.2'
-    androidTestImplementation 'androidx.test:runner:1.4.0'
-    androidTestImplementation 'androidx.test:rules:1.4.0'
+    androidTestImplementation 'androidx.test:runner:1.5.2'
+    androidTestImplementation 'androidx.test:rules:1.5.0'
 
-    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
-    androidTestImplementation 'androidx.test.ext:truth:1.4.0'
-    androidTestImplementation 'com.google.truth:truth:1.1.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
+    androidTestImplementation 'androidx.test.ext:truth:1.5.0'
+    androidTestImplementation 'com.google.truth:truth:1.1.3'
 
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
 }
diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index 2744acd..8a01677 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -37,6 +37,7 @@
 
         <activity
             android:name=".ui.MainActivity"
+            android:exported="true"
             android:windowSoftInputMode="stateUnchanged|adjustResize">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
diff --git a/android/app/src/main/java/com/example/android/fido2/api/AuthApi.kt b/android/app/src/main/java/com/example/android/fido2/api/AuthApi.kt
index 2137043..0272a80 100644
--- a/android/app/src/main/java/com/example/android/fido2/api/AuthApi.kt
+++ b/android/app/src/main/java/com/example/android/fido2/api/AuthApi.kt
@@ -401,7 +401,7 @@ class AuthApi @Inject constructor(
         return PublicKeyCredentialUserEntity(
             id!!.decodeBase64(),
             name!!,
-            null, // icon
+            "", // icon
             displayName
         )
     }
diff --git a/android/build.gradle b/android/build.gradle
index 517769d..d95d7f0 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -15,15 +15,15 @@
  */
 
 buildscript {
-    ext.kotlin_version = '1.5.21'
+    ext.kotlin_version = '1.8.22'
     repositories {
         google()
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.0.0'
+        classpath 'com.android.tools.build:gradle:8.0.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-        classpath 'com.google.dagger:hilt-android-gradle-plugin:2.38.1'
+        classpath 'com.google.dagger:hilt-android-gradle-plugin:2.47'
     }
 }
 
diff --git a/android/gradle/wrapper/gradle-wrapper.jar b/android/gradle/wrapper/gradle-wrapper.jar
index f6b961f..e708b1c 100644
Binary files a/android/gradle/wrapper/gradle-wrapper.jar and b/android/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/android/gradle/wrapper/gradle-wrapper.properties b/android/gradle/wrapper/gradle-wrapper.properties
index 78c6495..0a6c63a 100644
--- a/android/gradle/wrapper/gradle-wrapper.properties
+++ b/android/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Nov 17 16:25:58 JST 2020
+#Wed Mar 15 12:21:42 JST 2023
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.0-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip