diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..1b8d08e
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,2 @@
+[*.{kt,kts}]
+ktlint_code_style = android
\ No newline at end of file
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7bf74f2..4d57671 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,7 +10,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-java@v1
         with:
-          java-version: 11
+          java-version: 17
       - if: ${{ !startsWith(github.ref, 'refs/tags/v') }}
         run: ./gradlew build --stacktrace
       - if: ${{ startsWith(github.ref, 'refs/tags/v') }}
diff --git a/README.md b/README.md
index d458649..ce956be 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ The foreground notification showing the connection status can be manually minimi
 
 ## Building
 
-Use Java 11 and execute the following command to build the apk.
+Use Java 17 and execute the following command to build the apk.
 
 ```bash
 $ ./gradlew build
diff --git a/app/build.gradle b/app/build.gradle
index d835026..a18c104 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,7 +1,7 @@
 plugins {
     id 'com.android.application'
     id 'kotlin-android'
-    id 'org.jmailen.kotlinter' version '3.13.0'
+    id 'org.jmailen.kotlinter' version '3.15.0'
 }
 
 android {
@@ -33,18 +33,20 @@ android {
         viewBinding true
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_11
-        targetCompatibility JavaVersion.VERSION_11
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
     }
     kotlinOptions {
-        jvmTarget = '11'
-    }
-    lintOptions {
-        disable 'GoogleAppIndexingWarning'
-        lintConfig file('../lint.xml')
+        jvmTarget = '17'
     }
     packagingOptions {
-        exclude 'META-INF/DEPENDENCIES'
+        resources {
+            excludes += ['META-INF/DEPENDENCIES']
+        }
+    }
+    lint {
+        disable 'GoogleAppIndexingWarning'
+        lintConfig file('../lint.xml')
     }
 }
 
@@ -64,13 +66,13 @@ if (project.hasProperty('sign')) {
 
 dependencies {
     implementation project(':client')
-    implementation 'androidx.appcompat:appcompat:1.5.1'
-    implementation 'androidx.core:core-splashscreen:1.0.0'
-    implementation 'com.google.android.material:material:1.7.0'
+    implementation 'androidx.appcompat:appcompat:1.6.1'
+    implementation 'androidx.core:core-splashscreen:1.0.1'
+    implementation 'com.google.android.material:material:1.9.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
     implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
     implementation 'androidx.vectordrawable:vectordrawable:1.1.0'
-    implementation 'androidx.preference:preference:1.2.0'
+    implementation 'androidx.preference:preference-ktx:1.2.0'
 
     implementation 'com.github.cyb3rko:QuickPermissions-Kotlin:1.0.2'
     implementation 'com.hypertrack:hyperlog:0.0.10'
diff --git a/app/src/main/kotlin/com/github/gotify/Utils.kt b/app/src/main/kotlin/com/github/gotify/Utils.kt
index 07193e9..772d562 100644
--- a/app/src/main/kotlin/com/github/gotify/Utils.kt
+++ b/app/src/main/kotlin/com/github/gotify/Utils.kt
@@ -17,12 +17,6 @@ import com.google.android.material.snackbar.Snackbar
 import com.google.gson.Gson
 import com.squareup.picasso.Picasso.LoadedFrom
 import com.squareup.picasso.Target
-import kotlinx.coroutines.CoroutineDispatcher
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
-import okio.Buffer
-import org.threeten.bp.OffsetDateTime
 import java.io.BufferedReader
 import java.io.IOException
 import java.io.InputStream
@@ -31,6 +25,12 @@ import java.net.MalformedURLException
 import java.net.URI
 import java.net.URISyntaxException
 import java.net.URL
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import okio.Buffer
+import org.threeten.bp.OffsetDateTime
 
 internal object Utils {
     val JSON: Gson = JSON().gson
diff --git a/app/src/main/kotlin/com/github/gotify/api/Api.kt b/app/src/main/kotlin/com/github/gotify/api/Api.kt
index 7b09a5a..a6640f6 100644
--- a/app/src/main/kotlin/com/github/gotify/api/Api.kt
+++ b/app/src/main/kotlin/com/github/gotify/api/Api.kt
@@ -1,7 +1,7 @@
 package com.github.gotify.api
 
-import retrofit2.Call
 import java.io.IOException
+import retrofit2.Call
 
 internal object Api {
     @Throws(ApiException::class)
diff --git a/app/src/main/kotlin/com/github/gotify/api/ApiException.kt b/app/src/main/kotlin/com/github/gotify/api/ApiException.kt
index e746bfb..91f2c98 100644
--- a/app/src/main/kotlin/com/github/gotify/api/ApiException.kt
+++ b/app/src/main/kotlin/com/github/gotify/api/ApiException.kt
@@ -1,7 +1,7 @@
 package com.github.gotify.api
 
-import retrofit2.Response
 import java.io.IOException
+import retrofit2.Response
 
 internal class ApiException : Exception {
     var body: String = ""
diff --git a/app/src/main/kotlin/com/github/gotify/api/Callback.kt b/app/src/main/kotlin/com/github/gotify/api/Callback.kt
index 8c1e1c8..0ef273c 100644
--- a/app/src/main/kotlin/com/github/gotify/api/Callback.kt
+++ b/app/src/main/kotlin/com/github/gotify/api/Callback.kt
@@ -51,7 +51,10 @@ internal class Callback<T> private constructor(
             )
         }
 
-        fun <T> call(onSuccess: SuccessCallback<T> = SuccessCallback {}, onError: ErrorCallback = ErrorCallback {}): retrofit2.Callback<T> {
+        fun <T> call(
+            onSuccess: SuccessCallback<T> = SuccessCallback {},
+            onError: ErrorCallback = ErrorCallback {}
+        ): retrofit2.Callback<T> {
             return RetrofitCallback(merge(of(onSuccess, onError), errorCallback()))
         }
 
diff --git a/app/src/main/kotlin/com/github/gotify/api/CertUtils.kt b/app/src/main/kotlin/com/github/gotify/api/CertUtils.kt
index f75cfc7..60a295b 100644
--- a/app/src/main/kotlin/com/github/gotify/api/CertUtils.kt
+++ b/app/src/main/kotlin/com/github/gotify/api/CertUtils.kt
@@ -4,7 +4,6 @@ import android.annotation.SuppressLint
 import com.github.gotify.SSLSettings
 import com.github.gotify.Utils
 import com.github.gotify.log.Log
-import okhttp3.OkHttpClient
 import java.io.IOException
 import java.security.GeneralSecurityException
 import java.security.KeyStore
@@ -16,6 +15,7 @@ import javax.net.ssl.SSLContext
 import javax.net.ssl.TrustManager
 import javax.net.ssl.TrustManagerFactory
 import javax.net.ssl.X509TrustManager
+import okhttp3.OkHttpClient
 
 internal object CertUtils {
     @SuppressLint("CustomX509TrustManager")
diff --git a/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt b/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt
index ac31707..402ffd0 100644
--- a/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt
+++ b/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt
@@ -31,8 +31,8 @@ import com.github.gotify.log.LogsActivity
 import com.github.gotify.log.UncaughtExceptionHandler
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.textfield.TextInputEditText
-import okhttp3.HttpUrl
 import java.security.cert.X509Certificate
+import okhttp3.HttpUrl
 
 internal class LoginActivity : AppCompatActivity() {
     companion object {
diff --git a/app/src/main/kotlin/com/github/gotify/messages/ListMessageAdapter.kt b/app/src/main/kotlin/com/github/gotify/messages/ListMessageAdapter.kt
index 0304528..04d092f 100644
--- a/app/src/main/kotlin/com/github/gotify/messages/ListMessageAdapter.kt
+++ b/app/src/main/kotlin/com/github/gotify/messages/ListMessageAdapter.kt
@@ -26,9 +26,9 @@ import com.github.gotify.databinding.MessageItemCompactBinding
 import com.github.gotify.messages.provider.MessageWithImage
 import com.squareup.picasso.Picasso
 import io.noties.markwon.Markwon
-import org.threeten.bp.OffsetDateTime
 import java.text.DateFormat
 import java.util.Date
+import org.threeten.bp.OffsetDateTime
 
 internal class ListMessageAdapter(
     private val context: Context,
diff --git a/app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt b/app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt
index d535cde..927bdca 100644
--- a/app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt
+++ b/app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt
@@ -56,9 +56,9 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.navigation.NavigationView
 import com.google.android.material.snackbar.BaseTransientBottomBar.BaseCallback
 import com.google.android.material.snackbar.Snackbar
+import java.io.IOException
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
-import java.io.IOException
 
 internal class MessagesActivity :
     AppCompatActivity(),
diff --git a/app/src/main/kotlin/com/github/gotify/picasso/PicassoHandler.kt b/app/src/main/kotlin/com/github/gotify/picasso/PicassoHandler.kt
index bddc3a4..1a80bdb 100644
--- a/app/src/main/kotlin/com/github/gotify/picasso/PicassoHandler.kt
+++ b/app/src/main/kotlin/com/github/gotify/picasso/PicassoHandler.kt
@@ -11,10 +11,10 @@ import com.github.gotify.client.model.Application
 import com.github.gotify.log.Log
 import com.squareup.picasso.OkHttp3Downloader
 import com.squareup.picasso.Picasso
-import okhttp3.Cache
-import okhttp3.OkHttpClient
 import java.io.File
 import java.io.IOException
+import okhttp3.Cache
+import okhttp3.OkHttpClient
 
 internal class PicassoHandler(private val context: Context, private val settings: Settings) {
     companion object {
diff --git a/app/src/main/kotlin/com/github/gotify/service/WebSocketConnection.kt b/app/src/main/kotlin/com/github/gotify/service/WebSocketConnection.kt
index f0b80ec..9ff0e4e 100644
--- a/app/src/main/kotlin/com/github/gotify/service/WebSocketConnection.kt
+++ b/app/src/main/kotlin/com/github/gotify/service/WebSocketConnection.kt
@@ -10,15 +10,15 @@ import com.github.gotify.Utils
 import com.github.gotify.api.CertUtils
 import com.github.gotify.client.model.Message
 import com.github.gotify.log.Log
+import java.util.Calendar
+import java.util.concurrent.TimeUnit
+import java.util.concurrent.atomic.AtomicLong
 import okhttp3.HttpUrl
 import okhttp3.OkHttpClient
 import okhttp3.Request
 import okhttp3.Response
 import okhttp3.WebSocket
 import okhttp3.WebSocketListener
-import java.util.Calendar
-import java.util.concurrent.TimeUnit
-import java.util.concurrent.atomic.AtomicLong
 
 internal class WebSocketConnection(
     private val baseUrl: String,
diff --git a/app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt b/app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt
index 108d054..de63a91 100644
--- a/app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt
+++ b/app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt
@@ -141,7 +141,7 @@ internal class WebSocketService : Service() {
                         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                             NotificationSupport.createChannels(
                                 this,
-                                (this.getSystemService(NOTIFICATION_SERVICE) as NotificationManager),
+                                (getSystemService(NOTIFICATION_SERVICE) as NotificationManager),
                                 apps
                             )
                         }
diff --git a/build.gradle b/build.gradle
index d8ddb3f..70ea2df 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,8 +6,8 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.3.1'
-        classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.20'
+        classpath 'com.android.tools.build:gradle:8.0.2'
+        classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.8.20'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle.properties b/gradle.properties
index 8de5058..65539cb 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,9 +6,13 @@
 # http://www.gradle.org/docs/current/userguide/build_environment.html
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
+android.defaults.buildfeatures.buildconfig=true
 android.enableJetifier=true
+android.nonFinalResIds=true
+android.nonTransitiveRClass=true
 android.useAndroidX=true
-org.gradle.jvmargs=-Xmx1536m
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+org.gradle.unsafe.configuration-cache=true
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index ae04661..e999d40 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-bin.zip
+distrubutionSha256Sum=e111cb9948407e26351227dabce49822fb88c37ee72f1d1582a69c68af2e702f
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists