diff --git a/examples/android-kotlin/README.md b/examples/android-kotlin/README.md
index 2412b8fb..50f039d5 100644
--- a/examples/android-kotlin/README.md
+++ b/examples/android-kotlin/README.md
@@ -20,7 +20,7 @@ export ANDROID_HOME=/path/to/android/sdk/
 make mobile-android
 
 # Copy the jar into `libs/` folder
-cp ./build/lib/gowaku.jar ./examples/android-kotlin/app/libs/.
+cp ./build/lib/gowaku.aar ./examples/android-kotlin/app/libs/.
 ```
 
 Open the project in Android Studio and run the example app.
diff --git a/examples/android-kotlin/app/libs/.gitkeep b/examples/android-kotlin/app/libs/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/examples/android-kotlin/app/src/main/java/com/example/waku/messages/DecodedPayload.kt b/examples/android-kotlin/app/src/main/java/com/example/waku/messages/DecodedPayload.kt
index 09281c01..e726e8e4 100644
--- a/examples/android-kotlin/app/src/main/java/com/example/waku/messages/DecodedPayload.kt
+++ b/examples/android-kotlin/app/src/main/java/com/example/waku/messages/DecodedPayload.kt
@@ -8,5 +8,5 @@ data class DecodedPayload(
     val pubkey: String?,
     val signature: String?,
     @Serializable(with = ByteArrayBase64Serializer::class) val data: ByteArray,
-    val padding: String?
+    @Serializable(with = ByteArrayBase64Serializer::class) val padding: ByteArray,
 )
diff --git a/examples/waku-csharp/waku-csharp/Waku.Node.cs b/examples/waku-csharp/waku-csharp/Waku.Node.cs
index 329c99e6..8d28df5b 100644
--- a/examples/waku-csharp/waku-csharp/Waku.Node.cs
+++ b/examples/waku-csharp/waku-csharp/Waku.Node.cs
@@ -33,7 +33,7 @@ namespace Waku
         public string? pubkey { get; set; }
         public string? signature { get; set; }
         public byte[] data { get; set; } = new byte[0];
-        public string? padding { get; set; }
+        public byte[] padding { get; set; } = new byte[0];
     }
 
     public class Peer