diff --git a/workmanager_android/android/build.gradle b/workmanager_android/android/build.gradle
index 3552b1be..4ce77b98 100644
--- a/workmanager_android/android/build.gradle
+++ b/workmanager_android/android/build.gradle
@@ -9,7 +9,11 @@ rootProject.allprojects {
 }
 
 apply plugin: 'com.android.library'
-apply plugin: 'kotlin-android'
+// AGP 9+ has built-in Kotlin support; older versions need the plugin explicitly.
+def agpMajor = com.android.Version.ANDROID_GRADLE_PLUGIN_VERSION.tokenize('.')[0] as int
+if (agpMajor < 9) {
+    apply plugin: 'kotlin-android'
+}
 
 android {
     // Conditional for compatibility with AGP <4.2.
@@ -34,12 +38,13 @@ android {
         targetCompatibility JavaVersion.VERSION_1_8
     }
 
-    kotlinOptions {
-        tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
-            kotlinOptions.jvmTarget = "1.8"
+    if (agpMajor < 9) {
+        kotlinOptions {
+            tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
+                kotlinOptions.jvmTarget = "1.8"
+            }
         }
     }
-
 }
 
 dependencies {