diff --git a/android/build.gradle b/android/build.gradle
index 56fa82d..9b8f988 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -25,6 +25,11 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 
 android {
+    // Conditional for compatibility with AGP <4.2.
+    if (project.android.hasProperty("namespace")) {
+      namespace 'com.chargebee.flutter.sdk'
+    }
+
     compileSdkVersion 30
 
     compileOptions {