diff --git a/EpcQrCodeAndroidApp/build.gradle.kts b/EpcQrCodeAndroidApp/build.gradle.kts
index dd9252d..d9fb213 100644
--- a/EpcQrCodeAndroidApp/build.gradle.kts
+++ b/EpcQrCodeAndroidApp/build.gradle.kts
@@ -9,6 +9,9 @@ group = "net.codinux.banking.epcqrcode.android"
 
 dependencies {
     implementation(project(":EpcQrCode"))
+
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.0")
+
     implementation("androidx.core:core-ktx:1.2.0")
     implementation("androidx.appcompat:appcompat:1.1.0")
     implementation("androidx.constraintlayout:constraintlayout:1.1.3")
diff --git a/EpcQrCodeAndroidApp/src/main/java/net/codinux/banking/epcqrcode/Extensions.kt b/EpcQrCodeAndroidApp/src/main/java/net/codinux/banking/epcqrcode/Extensions.kt
index 0efbb3a..bc9d761 100644
--- a/EpcQrCodeAndroidApp/src/main/java/net/codinux/banking/epcqrcode/Extensions.kt
+++ b/EpcQrCodeAndroidApp/src/main/java/net/codinux/banking/epcqrcode/Extensions.kt
@@ -9,7 +9,7 @@ import com.google.android.material.textfield.TextInputEditText
 import com.soywiz.korim.format.toAndroidBitmap
 
 
-val EpcQrCode.image: Bitmap
+val EpcQrCode.androidBitmap: Bitmap
     get() = this.bitmap.toAndroidBitmap()
 
 
diff --git a/EpcQrCodeAndroidApp/src/main/java/net/codinux/banking/epcqrcode/MainActivity.kt b/EpcQrCodeAndroidApp/src/main/java/net/codinux/banking/epcqrcode/MainActivity.kt
index ebfb775..b0f4038 100644
--- a/EpcQrCodeAndroidApp/src/main/java/net/codinux/banking/epcqrcode/MainActivity.kt
+++ b/EpcQrCodeAndroidApp/src/main/java/net/codinux/banking/epcqrcode/MainActivity.kt
@@ -3,8 +3,13 @@ package net.codinux.banking.epcqrcode
 import android.graphics.Bitmap
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.view.View
+import android.widget.Button
 import kotlinx.android.synthetic.main.activity_main.*
-import kotlin.concurrent.thread
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 
 
 class MainActivity : AppCompatActivity() {
@@ -14,7 +19,13 @@ class MainActivity : AppCompatActivity() {
 
         setContentView(R.layout.activity_main)
 
-        btnGenerateQrCode.setOnClickListener { generateQrCode() }
+        findViewById<Button>(R.id.btnGenerateQrCode)?.setOnClickListener(object : View.OnClickListener { // don't know why Lambda is not working anymore
+
+            override fun onClick(p0: View?) {
+                generateQrCode()
+            }
+
+        })
     }
 
 
@@ -29,14 +40,14 @@ class MainActivity : AppCompatActivity() {
     }
 
     private fun generateQrCodeAsync(param: EpcQrCodeConfig, done: (Bitmap) -> Unit) {
-        thread {
+        GlobalScope.launch(Dispatchers.IO) {
             val density = resources.displayMetrics.density
             val config = EncodeToQrCodeConfig((EncodeToQrCodeConfig.DefaultWidth * density).toInt(), (EncodeToQrCodeConfig.DefaultHeight * density).toInt())
 
             val epcQrCode = EpcQrCodeGenerator().generateEpcQrCode(param)
 
-            runOnUiThread {
-                done(epcQrCode.image)
+            withContext(Dispatchers.Main) {
+                done(epcQrCode.androidBitmap)
             }
         }
     }
diff --git a/build.gradle.kts b/build.gradle.kts
index 128825a..8480eac 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -6,8 +6,8 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.4.10")
-        classpath("com.android.tools.build:gradle:3.5.2")
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.10")
+        classpath("com.android.tools.build:gradle:4.0.2")
     }
 }
 
diff --git a/gradle.properties b/gradle.properties
index 462404e..723a072 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -5,4 +5,10 @@ xcodeproj=./EpcQrCodeiOSApp
 
 kotlinVersion=1.6.10
 
-quarkusVersion=1.8.2.Final
+coroutinesVersion=1.6.0
+
+
+quarkusVersion=1.9.2.Final
+
+
+android.useAndroidX=true
diff --git a/settings.gradle.kts b/settings.gradle.kts
index c1ae01e..dbf5b4a 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -8,13 +8,13 @@ pluginManagement {
     resolutionStrategy {
         eachPlugin {
             if (requested.id.namespace == "com.android" || requested.id.name == "kotlin-android-extensions") {
-                useModule("com.android.tools.build:gradle:3.5.2")
+                useModule("com.android.tools.build:gradle:4.0.2")
             }
         }
     }
 
     plugins {
-        id("io.quarkus") version "1.8.2.Final" // TODO: why doesn't he find quarkusVersion?
+        id("io.quarkus") version "1.9.2.Final" // TODO: why doesn't he find quarkusVersion?
     }
 }