diff --git a/flutter_libs/android/build.gradle b/flutter_libs/android/build.gradle
index bbf13601..9ad01bac 100644
--- a/flutter_libs/android/build.gradle
+++ b/flutter_libs/android/build.gradle
@@ -25,6 +25,10 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 
 android {
+    if (project.android.hasProperty("namespace")) {
+        namespace 'io.objectbox.objectbox_flutter_libs'
+    }
+
     compileSdkVersion 31
 
     compileOptions {
diff --git a/sync_flutter_libs/android/build.gradle b/sync_flutter_libs/android/build.gradle
index c0cfb61c..eb76ec3f 100644
--- a/sync_flutter_libs/android/build.gradle
+++ b/sync_flutter_libs/android/build.gradle
@@ -25,6 +25,10 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 
 android {
+    if (project.android.hasProperty("namespace")) {
+        namespace 'io.objectbox.objectbox_sync_flutter_libs'
+    }
+
     compileSdkVersion 31
 
     compileOptions {