diff --git a/app/build.gradle b/app/build.gradle
index f3d7f91..b64167b 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,6 +1,5 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
-apply plugin: 'kotlin-android-extensions'
 apply plugin: 'com.google.firebase.crashlytics'
 apply plugin: 'com.google.gms.google-services'
 apply plugin: 'com.mikepenz.aboutlibraries.plugin'
@@ -44,8 +43,8 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_11
+        targetCompatibility JavaVersion.VERSION_11
     }
     kotlinOptions {
         jvmTarget = '11'
@@ -59,28 +58,26 @@ android {
 }
 
 dependencies {
-    implementation fileTree(dir: "libs", include: ["*.jar"])
-    implementation 'androidx.appcompat:appcompat:1.3.1'
+    implementation platform('com.google.firebase:firebase-bom:30.0.1')
+    implementation "com.mikepenz:aboutlibraries-core:$about_libraries_version"
+    implementation "com.mikepenz:aboutlibraries:$about_libraries_version"
+    implementation 'androidx.appcompat:appcompat:1.4.2'
     implementation 'androidx.cardview:cardview:1.0.0'
-    implementation 'androidx.core:core-ktx:1.6.0'
-    implementation "androidx.multidex:multidex:2.0.1"
-    implementation 'androidx.navigation:navigation-fragment-ktx:2.3.5'
-    implementation 'androidx.navigation:navigation-ui-ktx:2.3.5'
+    implementation 'androidx.core:core-ktx:1.8.0'
+    implementation 'androidx.multidex:multidex:2.0.1'
+    implementation 'androidx.navigation:navigation-fragment-ktx:2.4.2'
+    implementation 'androidx.navigation:navigation-ui-ktx:2.4.2'
     implementation 'androidx.recyclerview:recyclerview:1.2.1'
-    implementation "androidx.swiperefreshlayout:swiperefreshlayout:1.1.0"
+    implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
     implementation 'com.afollestad.material-dialogs:bottomsheets:3.3.0'
     implementation 'com.airbnb.android:lottie:3.7.0'
     implementation 'com.amitshekhar.android:android-networking:1.0.2'
-    implementation 'com.github.cyb3rko:about-icons:1.4.0'
     implementation 'com.github.GrenderG:Toasty:1.5.0'
-    implementation "com.github.parse-community.Parse-SDK-Android:parse:1.26.0"
+    implementation 'com.github.cyb3rko:about-icons:1.5.0'
+    implementation 'com.github.parse-community.Parse-SDK-Android:parse:1.26.0'
     implementation 'com.google.android.material:material:1.6.1'
-    implementation 'com.google.firebase:firebase-crashlytics-ktx:18.2.1'
+    implementation 'com.google.firebase:firebase-crashlytics-ktx' // BOM versioning
     implementation 'com.itextpdf:itextpdf:5.5.13.2'
-    implementation "com.mikepenz:aboutlibraries:$about_libraries_version"
-    implementation "com.mikepenz:aboutlibraries-core:$about_libraries_version"
     implementation 'io.github.medyo:android-about-page:2.0.0'
-    implementation 'me.ibrahimyilmaz:kiel:1.1.0'
-    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
     implementation project(':installer')
 }
diff --git a/app/src/main/java/com/cyb3rko/techniklogger/fragments/ManageTechnikerFragment.kt b/app/src/main/java/com/cyb3rko/techniklogger/fragments/ManageTechnikerFragment.kt
index c2642de..31b9a10 100644
--- a/app/src/main/java/com/cyb3rko/techniklogger/fragments/ManageTechnikerFragment.kt
+++ b/app/src/main/java/com/cyb3rko/techniklogger/fragments/ManageTechnikerFragment.kt
@@ -24,7 +24,6 @@ import com.google.android.material.textfield.TextInputEditText
 import com.parse.ParseObject
 import com.parse.ParseQuery
 import es.dmoral.toasty.Toasty
-import kotlinx.android.synthetic.main.techniker_dialog.view.*
 
 class ManageTechnikerFragment : Fragment() {
     private var _binding: FragmentManageTechnikerBinding? = null
@@ -57,8 +56,8 @@ class ManageTechnikerFragment : Fragment() {
                 customView(R.layout.techniker_dialog, horizontalPadding = true)
                 positiveButton(text = "Hinzufügen") {
                     val view = it.view
-                    val newName = view.name.text.toString()
-                    val newAdmin = view.admin.isChecked
+                    val newName = view.findViewById<TextInputEditText>(R.id.name).text.toString()
+                    val newAdmin = view.findViewById<SwitchMaterial>(R.id.admin).isChecked
                     ParseObject.create(CLASS_TECHNIKER).apply {
                         put(COLUMN_TECHNIKER_NAME, newName)
                         put(COLUMN_TECHNIKER_ADMIN, newAdmin)
@@ -121,8 +120,8 @@ class ManageTechnikerFragment : Fragment() {
                         customView(0, dialogView, horizontalPadding = true)
                         onDismiss {
                             val view = it.view
-                            val newName = view.name.text.toString()
-                            val newAdmin = view.admin.isChecked
+                            val newName = view.findViewById<TextInputEditText>(R.id.name).text.toString()
+                            val newAdmin = view.findViewById<SwitchMaterial>(R.id.admin).isChecked
                             val parseObject = techniker[index]
                             if (newName != parseObject.getString(COLUMN_TECHNIKER_NAME) ||
                                 newAdmin != parseObject.getBoolean(COLUMN_TECHNIKER_ADMIN)
diff --git a/build.gradle b/build.gradle
index 204b56a..06466a7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,18 +1,16 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
     ext.about_libraries_version = "8.3.0"
-    ext.kotlin_version = "1.5.20"
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.0.1'
-        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.5.2'
-        classpath 'com.google.gms:google-services:4.3.8'
+        classpath 'com.android.tools.build:gradle:7.2.1'
+        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.9.0'
+        classpath 'com.google.gms:google-services:4.3.12'
         classpath "com.mikepenz.aboutlibraries.plugin:aboutlibraries-plugin:$about_libraries_version"
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-        classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.3.5"
+        classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.4.2"
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 2b01f57..a779203 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-bin.zip
diff --git a/installer/build.gradle b/installer/build.gradle
index 778c516..67abf1b 100644
--- a/installer/build.gradle
+++ b/installer/build.gradle
@@ -10,8 +10,6 @@ android {
     defaultConfig {
         minSdkVersion 19
         targetSdkVersion 31
-        versionCode 2
-        versionName "1.1"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles "consumer-rules.pro"
@@ -38,7 +36,7 @@ android {
 
 dependencies {
 
-    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:1.5.20"
     implementation 'androidx.core:core-ktx:1.6.0'
     implementation 'androidx.appcompat:appcompat:1.3.1'
     implementation 'com.google.android.material:material:1.4.0'