diff --git a/app/build.gradle b/app/build.gradle
index 571d033..06e6698 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,13 +1,17 @@
-apply plugin: 'com.android.application'
+plugins {
+    id 'com.android.application'
+}
 
 android {
-    compileSdkVersion 16
-    buildToolsVersion "26.0.2"
+    compileSdkVersion 33
 
     defaultConfig {
         applicationId "de.ubuntix.android.birthdayreminder"
         minSdkVersion 7
-        targetSdkVersion 16
+        targetSdkVersion 31
+        versionCode 1
+        versionName "2.0"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
 
     buildTypes {
@@ -15,5 +19,14 @@ android {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
         }
+        compileOptions {
+            sourceCompatibility JavaVersion.VERSION_1_8
+            targetCompatibility JavaVersion.VERSION_1_8
+        }
     }
+    namespace 'de.ubuntix.android.birthdayreminder'
+}
+
+dependencies {
+
 }
diff --git a/build.gradle b/build.gradle
index 8674409..1585962 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,15 +1,19 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
     repositories {
-        jcenter()
+       // jcenter()
+        mavenCentral()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.android.tools.build:gradle:8.0.2'
     }
 }
 
 allprojects {
     repositories {
-        jcenter()
+        mavenCentral()
+        google()
+     //  jcenter()
     }
 }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index bb23672..c4a9727 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,5 @@
-#Sat Oct 14 09:48:46 CEST 2017
-distributionBase=GRADLE_USER_HOME
+#Sun Jun 18 20:56:20 CEST 2023
 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-3.3-all.zip