diff --git a/WordPress/build.gradle b/WordPress/build.gradle
index 175a865f6b33..f52cde4f419f 100644
--- a/WordPress/build.gradle
+++ b/WordPress/build.gradle
@@ -3,7 +3,6 @@ import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 plugins {
     alias(libs.plugins.android.application)
-    alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlin.compose)
     alias(libs.plugins.kotlin.parcelize)
     alias(libs.plugins.kotlin.allopen)
@@ -90,6 +89,10 @@ allOpen {
     annotation 'org.wordpress.android.testing.OpenClassAnnotation'
 }
 
+base {
+    archivesName = "org.wordpress.android"
+}
+
 android {
     useLibrary 'android.test.runner'
 
@@ -100,16 +103,16 @@ android {
 
     def versionProperties = loadPropertiesFromFile(file("${rootDir}/version.properties"))
 
+    compileSdk rootProject.compileSdkVersion
+
     defaultConfig {
         applicationId "org.wordpress.android"
-        archivesBaseName = "$applicationId"
 
         versionName project.findProperty("prototypeBuildVersionName") ?: versionProperties.getProperty("versionName")
         versionCode versionProperties.getProperty("versionCode").toInteger()
 
         minSdkVersion rootProject.minSdkVersion
         targetSdkVersion rootProject.targetSdkVersion
-        compileSdk rootProject.compileSdkVersion
 
         testInstrumentationRunner 'org.wordpress.android.WordPressTestRunner'
 
@@ -252,7 +255,7 @@ android {
             // Proguard is used to shrink our apk, and reduce the number of methods in our final apk,
             // but we don't obfuscate the bytecode.
             minifyEnabled true
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard.cfg'
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard.cfg'
             buildConfigField "boolean", "ENABLE_DEBUG_SETTINGS", "false"
         }
 
@@ -599,14 +602,24 @@ tasks.register("printVersionName") {
     }
 }
 
-tasks.register("printAllVersions") {
-    def versions = android.applicationVariants.collect {
-        [it.name, it.versionName, it.versionCode]
+def allVariantVersions = []
+
+androidComponents {
+    onVariants(selector().all()) { variant ->
+        variant.outputs.each { output ->
+            allVariantVersions.add([
+                name: variant.name,
+                versionName: output.versionName,
+                versionCode: output.versionCode
+            ])
+        }
     }
+}
 
+tasks.register("printAllVersions") {
     doLast {
-        versions.each { name, versionName, versionCode ->
-            println "$name: $versionName ($versionCode)"
+        allVariantVersions.each { data ->
+            println "${data.name}: ${data.versionName.get()} (${data.versionCode.get()})"
         }
     }
 }
@@ -629,25 +642,36 @@ android {
     androidResources {
         generateLocaleConfig = true
     }
+}
 
-    // Copy React Native JavaScript bundle and source map so they can be upload it to the Crash logging
-    // service during the build process.
-    applicationVariants.configureEach { variant ->
-        def variantAssets = variant.mergeAssetsProvider.get().outputDir.get()
-
-        tasks.register("delete${variant.name.capitalize()}ReactNativeBundleSourceMap", Delete) {
-            delete(fileTree(dir: variantAssets, includes: ['**/*.bundle.map']))
+// Copy React Native JavaScript bundle and source map so they can be uploaded to the Crash logging
+// service during the build process.
+androidComponents {
+    onVariants(selector().all()) { variant ->
+        def capitalizedName = variant.name.capitalize()
+        def assetsDir = variant.artifacts.get(
+            com.android.build.api.artifact.SingleArtifact.ASSETS.INSTANCE
+        )
+
+        def deleteTask = tasks.register(
+            "delete${capitalizedName}ReactNativeBundleSourceMap", Delete
+        ) {
+            delete(fileTree(dir: assetsDir, includes: ['**/*.bundle.map']))
         }
 
-        tasks.register("copy${variant.name.capitalize()}ReactNativeBundleSourceMap", Copy) {
-            from(variantAssets)
-            into("${buildDir}/react-native-bundle-source-map")
+        def copyTask = tasks.register(
+            "copy${capitalizedName}ReactNativeBundleSourceMap", Copy
+        ) {
+            from(assetsDir)
+            into(layout.buildDirectory.dir("react-native-bundle-source-map"))
             include("*.bundle", "*.bundle.map")
-            finalizedBy("delete${variant.name.capitalize()}ReactNativeBundleSourceMap")
+            finalizedBy(deleteTask)
         }
 
-        variant.mergeAssetsProvider.configure {
-            finalizedBy("copy${variant.name.capitalize()}ReactNativeBundleSourceMap")
+        afterEvaluate {
+            tasks.named("merge${capitalizedName}Assets").configure {
+                finalizedBy(copyTask)
+            }
         }
     }
 }
diff --git a/build.gradle b/build.gradle
index 8e252bffc3d4..535421a56291 100644
--- a/build.gradle
+++ b/build.gradle
@@ -14,13 +14,12 @@ plugins {
     alias(libs.plugins.android.library).apply(false)
     alias(libs.plugins.google.services).apply(false)
     alias(libs.plugins.kotlin.allopen).apply(false)
-    alias(libs.plugins.kotlin.android).apply(false)
     alias(libs.plugins.kotlin.compose).apply(false)
     alias(libs.plugins.kotlin.jvm).apply(false)
     alias(libs.plugins.kotlin.parcelize).apply(false)
     alias(libs.plugins.kotlin.serialization).apply(false)
     alias(libs.plugins.ksp).apply(false)
-    alias(libs.plugins.kapt).apply(false)
+    alias(libs.plugins.legacy.kapt).apply(false)
     alias(libs.plugins.room).apply(false)
 }
 
@@ -98,7 +97,7 @@ allprojects {
 subprojects {
     plugins.withType(com.android.build.gradle.AppPlugin) {
         android {
-            lintOptions {
+            lint {
                 warningsAsErrors = true
                 checkDependencies true
                 checkGeneratedSources = true
@@ -114,7 +113,7 @@ subprojects {
     }
     plugins.withType(com.android.build.gradle.LibraryPlugin) {
         android {
-            lintOptions {
+            lint {
                 checkDependencies false
                 lintConfig file("${project.rootDir}/config/lint/lint.xml")
             }
diff --git a/gradle.properties b/gradle.properties
index 18fcd989917a..e01cf8d6db55 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -4,8 +4,6 @@ org.gradle.configureondemand=true
 org.gradle.caching=true
 org.gradle.configuration-cache=true
 
-android.useAndroidX=true
-android.enableJetifier=false
 android.nonTransitiveRClass=true
 android.nonFinalResIds=true
 android.enableR8.fullMode=false
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index d4a7e4070f6c..ff98e6de9dfe 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,5 +1,5 @@
 [versions]
-agp = '8.10.1'
+agp = '9.0.1'
 airbnb-lottie = '6.7.1'
 android-desugar = '2.1.5'
 android-installreferrer = '2.2'
@@ -56,9 +56,9 @@ dependency-analysis = '3.6.1'
 facebook-react = '0.73.3'
 facebook-shimmer = '0.5.0'
 fastlane-screengrab = '2.1.1'
-fladle = '0.19.0'
+fladle = '0.21.0'
 google-autoservice = '1.1.1'
-google-dagger = '2.58'
+google-dagger = '2.59.2'
 google-exoplayer = '2.13.3'
 google-firebase-bom = '34.10.0'
 google-firebase-iid = '21.1.0'
@@ -281,10 +281,9 @@ detekt = { id = "io.gitlab.arturbosch.detekt", version.ref = "detekt" }
 fladle = { id = "com.osacky.fladle", version.ref = "fladle" }
 google-dagger-hilt = { id = "com.google.dagger.hilt.android", version.ref = "google-dagger" }
 google-services = { id = "com.google.gms.google-services", version.ref = "google-services" }
-kapt = { id = "org.jetbrains.kotlin.kapt", version.ref = "kotlin-main" }
 kotlin-allopen = { id = "org.jetbrains.kotlin.plugin.allopen", version.ref = "kotlin-main" }
-kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin-main" }
 kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin-main" }
+legacy-kapt = { id = "com.android.legacy-kapt", version.ref = "agp" }
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin-main" }
 kotlin-parcelize = { id = "org.jetbrains.kotlin.plugin.parcelize", version.ref = "kotlin-main" }
 kotlin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin-main" }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index b8cea9f02a5b..6bf62392cf2d 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,7 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=296742a352f0b20ec14b143fb684965ad66086c7810b7b255dee216670716175
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.12.1-all.zip
+distributionSha256Sum=b84e04fa845fecba48551f425957641074fcc00a88a84d2aae5808743b35fc85
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-all.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/libs/annotations/build.gradle b/libs/annotations/build.gradle
index d4a8488c3d99..3d90f22f47ce 100644
--- a/libs/annotations/build.gradle
+++ b/libs/annotations/build.gradle
@@ -5,7 +5,7 @@ plugins {
     alias(libs.plugins.dependency.analysis)
 }
 
-kotlin {
+java {
     sourceCompatibility = JvmTarget.fromTarget(libs.versions.java.get()).target
     targetCompatibility = JvmTarget.fromTarget(libs.versions.java.get()).target
 }
diff --git a/libs/editor/build.gradle b/libs/editor/build.gradle
index 741a84b0b39f..89c4c547820c 100644
--- a/libs/editor/build.gradle
+++ b/libs/editor/build.gradle
@@ -2,7 +2,6 @@ import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 plugins {
     alias(libs.plugins.android.library)
-    alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlin.parcelize)
     alias(libs.plugins.kotlinx.kover)
     alias(libs.plugins.dependency.analysis)
diff --git a/libs/fluxc/build.gradle b/libs/fluxc/build.gradle
index bf279d3f5cea..bcbde42c88a9 100644
--- a/libs/fluxc/build.gradle
+++ b/libs/fluxc/build.gradle
@@ -3,9 +3,8 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
     alias(libs.plugins.android.library)
-    alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlin.parcelize)
-    alias(libs.plugins.kapt)
+    alias(libs.plugins.legacy.kapt)
     alias(libs.plugins.ksp)
     alias(libs.plugins.room)
     alias(libs.plugins.kotlinx.kover)
diff --git a/libs/image-editor/build.gradle b/libs/image-editor/build.gradle
index 9a81591dc3d0..87ad3e9ea4ae 100644
--- a/libs/image-editor/build.gradle
+++ b/libs/image-editor/build.gradle
@@ -2,7 +2,6 @@ import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 plugins {
     alias(libs.plugins.android.library)
-    alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlin.parcelize)
     alias(libs.plugins.androidx.navigation.safeargs)
     alias(libs.plugins.kotlinx.kover)
diff --git a/libs/login/build.gradle b/libs/login/build.gradle
index d813a14c7c51..3bf7ac237029 100644
--- a/libs/login/build.gradle
+++ b/libs/login/build.gradle
@@ -2,7 +2,6 @@ import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 plugins {
     alias(libs.plugins.android.library)
-    alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlinx.kover)
     alias(libs.plugins.ksp)
     alias(libs.plugins.dependency.analysis)
diff --git a/libs/posttypes/build.gradle b/libs/posttypes/build.gradle
index ec731c6e2b94..d3a52e5b820e 100644
--- a/libs/posttypes/build.gradle
+++ b/libs/posttypes/build.gradle
@@ -2,7 +2,6 @@ import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 plugins {
     alias(libs.plugins.android.library)
-    alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlin.compose)
     alias(libs.plugins.kotlin.parcelize)
     alias(libs.plugins.google.dagger.hilt)
diff --git a/libs/posttypes/src/main/AndroidManifest.xml b/libs/posttypes/src/main/AndroidManifest.xml
index b69d73104e70..8a85733538f7 100644
--- a/libs/posttypes/src/main/AndroidManifest.xml
+++ b/libs/posttypes/src/main/AndroidManifest.xml
@@ -6,7 +6,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
     <application
-        android:allowBackup="false"
         android:usesCleartextTraffic="false"
         tools:ignore="UnusedAttribute">
         <activity
diff --git a/libs/processors/build.gradle b/libs/processors/build.gradle
index ac37b6dbe039..7acbd9f4e205 100644
--- a/libs/processors/build.gradle
+++ b/libs/processors/build.gradle
@@ -6,7 +6,7 @@ plugins {
     alias(libs.plugins.dependency.analysis)
 }
 
-kotlin {
+java {
     sourceCompatibility = JvmTarget.fromTarget(libs.versions.java.get()).target
     targetCompatibility = JvmTarget.fromTarget(libs.versions.java.get()).target
 }