diff --git a/android/build.gradle b/android/build.gradle
index 4640937..8ea9c96 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.simform.flutter_credit_card'
+    }
+    
     compileSdk 31
 
     compileOptions {