diff --git a/app/build.gradle b/app/build.gradle
index d6b49f232..3705776b6 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -118,7 +118,6 @@ ext {
 
     leakCanaryVersion = '2.12'
     stethoVersion = '1.6.0'
-    mockitoVersion = '4.0.0'
 }
 
 configurations {
@@ -237,13 +236,10 @@ dependencies {
     kapt "frankiesardo:icepick-processor:${icepickVersion}"
 
     // HTML parser
-    implementation "org.jsoup:jsoup:1.16.1"
+    implementation "org.jsoup:jsoup:1.16.2"
 
     // HTTP client
-    implementation "com.squareup.okhttp3:okhttp:4.11.0"
-    // okhttp3:4.11.0 introduces a vulnerability from com.squareup.okio:okio@3.3.0,
-    // remove com.squareup.okio:okio when updating okhttp
-    implementation "com.squareup.okio:okio:3.4.0"
+    implementation "com.squareup.okhttp3:okhttp:4.12.0"
 
     // Media player
     implementation "com.google.android.exoplayer:exoplayer-core:${exoPlayerVersion}"
@@ -272,19 +268,19 @@ dependencies {
     implementation "io.noties.markwon:linkify:${markwonVersion}"
 
     // Crash reporting
-    implementation "ch.acra:acra-core:5.10.1"
+    implementation "ch.acra:acra-core:5.11.3"
 
     // Properly restarting
     implementation 'com.jakewharton:process-phoenix:2.1.2'
 
     // Reactive extensions for Java VM
-    implementation "io.reactivex.rxjava3:rxjava:3.1.6"
+    implementation "io.reactivex.rxjava3:rxjava:3.1.8"
     implementation "io.reactivex.rxjava3:rxandroid:3.0.2"
     // RxJava binding APIs for Android UI widgets
     implementation "com.jakewharton.rxbinding4:rxbinding:4.0.0"
 
     // Date and time formatting
-    implementation "org.ocpsoft.prettytime:prettytime:5.0.6.Final"
+    implementation "org.ocpsoft.prettytime:prettytime:5.0.7.Final"
 
 /** Debugging **/
     // Memory leak detection
@@ -297,13 +293,12 @@ dependencies {
 
 /** Testing **/
     testImplementation 'junit:junit:4.13.2'
-    testImplementation "org.mockito:mockito-core:${mockitoVersion}"
-    testImplementation "org.mockito:mockito-inline:${mockitoVersion}"
+    testImplementation 'org.mockito:mockito-core:5.6.0'
 
     androidTestImplementation "androidx.test.ext:junit:1.1.5"
     androidTestImplementation "androidx.test:runner:1.5.2"
     androidTestImplementation "androidx.room:room-testing:${androidxRoomVersion}"
-    androidTestImplementation "org.assertj:assertj-core:3.23.1"
+    androidTestImplementation "org.assertj:assertj-core:3.24.2"
 }
 
 static String getGitWorkingBranch() {
diff --git a/app/src/main/java/org/schabi/newpipe/database/Converters.kt b/app/src/main/java/org/schabi/newpipe/database/Converters.kt
index 0eafcede1..6f705a5e4 100644
--- a/app/src/main/java/org/schabi/newpipe/database/Converters.kt
+++ b/app/src/main/java/org/schabi/newpipe/database/Converters.kt
@@ -47,6 +47,6 @@ object Converters {
 
     @TypeConverter
     fun feedGroupIconOf(id: Int): FeedGroupIcon {
-        return FeedGroupIcon.values().first { it.id == id }
+        return FeedGroupIcon.entries.first { it.id == id }
     }
 }
diff --git a/app/src/main/java/org/schabi/newpipe/local/feed/service/FeedEventManager.kt b/app/src/main/java/org/schabi/newpipe/local/feed/service/FeedEventManager.kt
index 3d19de9c6..1c2826e7a 100644
--- a/app/src/main/java/org/schabi/newpipe/local/feed/service/FeedEventManager.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/feed/service/FeedEventManager.kt
@@ -26,7 +26,7 @@ object FeedEventManager {
     }
 
     sealed class Event {
-        object IdleEvent : Event()
+        data object IdleEvent : Event()
         data class ProgressEvent(val currentProgress: Int = -1, val maxProgress: Int = -1, @StringRes val progressMessage: Int = 0) : Event() {
             constructor(@StringRes progressMessage: Int) : this(-1, -1, progressMessage)
         }
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt
index 19c581c08..41761fb01 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt
@@ -55,10 +55,10 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
     private var groupSortOrder: Long = -1
 
     sealed class ScreenState : Serializable {
-        object InitialScreen : ScreenState()
-        object IconPickerScreen : ScreenState()
-        object SubscriptionsPickerScreen : ScreenState()
-        object DeleteScreen : ScreenState()
+        data object InitialScreen : ScreenState()
+        data object IconPickerScreen : ScreenState()
+        data object SubscriptionsPickerScreen : ScreenState()
+        data object DeleteScreen : ScreenState()
     }
 
     @State @JvmField var selectedIcon: FeedGroupIcon? = null
@@ -370,7 +370,7 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
 
     private fun setupIconPicker() {
         val groupAdapter = GroupieAdapter()
-        groupAdapter.addAll(FeedGroupIcon.values().map { PickerIconItem(it) })
+        groupAdapter.addAll(FeedGroupIcon.entries.map { PickerIconItem(it) })
 
         feedGroupCreateBinding.iconSelector.apply {
             layoutManager = GridLayoutManager(requireContext(), 7, RecyclerView.VERTICAL, false)
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialogViewModel.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialogViewModel.kt
index eff1a4400..292bda394 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialogViewModel.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialogViewModel.kt
@@ -110,8 +110,8 @@ class FeedGroupDialogViewModel(
     }
 
     sealed class DialogEvent {
-        object ProcessingEvent : DialogEvent()
-        object SuccessEvent : DialogEvent()
+        data object ProcessingEvent : DialogEvent()
+        data object SuccessEvent : DialogEvent()
     }
 
     data class Filter(val query: String, val showOnlyUngrouped: Boolean)
diff --git a/app/src/test/java/org/schabi/newpipe/local/subscription/FeedGroupIconTest.kt b/app/src/test/java/org/schabi/newpipe/local/subscription/FeedGroupIconTest.kt
index 1479c3d1e..2fc44d9b7 100644
--- a/app/src/test/java/org/schabi/newpipe/local/subscription/FeedGroupIconTest.kt
+++ b/app/src/test/java/org/schabi/newpipe/local/subscription/FeedGroupIconTest.kt
@@ -9,7 +9,7 @@ class FeedGroupIconTest {
     fun `No gaps and repeated ids`() {
         val usedIds = HashSet<Int>()
 
-        for ((shouldBeId, currentIcon) in FeedGroupIcon.values().withIndex()) {
+        for ((shouldBeId, currentIcon) in FeedGroupIcon.entries.withIndex()) {
             val added = usedIds.add(currentIcon.id)
             assertTrue("Repeated ids (current item: ${currentIcon.name} - ${currentIcon.id})", added)
 
@@ -24,7 +24,7 @@ class FeedGroupIconTest {
     fun `No icons pointing to the same attr`() {
         val usedIcons = HashSet<Int>()
 
-        for (groupIcon in FeedGroupIcon.values()) {
+        for (groupIcon in FeedGroupIcon.entries) {
             val added = usedIcons.add(groupIcon.drawableResource)
             assertTrue("Repeated icon (current item: ${groupIcon.name} - ${groupIcon.id})", added)
         }
diff --git a/build.gradle b/build.gradle
index f1c861c9f..2f3d292bb 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,13 +1,13 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.8.22'
+    ext.kotlin_version = '1.9.10'
     repositories {
         google()
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:8.1.1'
+        classpath 'com.android.tools.build:gradle:8.1.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong