diff --git a/FitConnect/FitConnect.csproj b/FitConnect/FitConnect.csproj
index c4077619411f1911413c68b3bb5023ffd09bc28a..a2bd577b7c8c2665edf1ae87bf165e9fde29198c 100644
--- a/FitConnect/FitConnect.csproj
+++ b/FitConnect/FitConnect.csproj
@@ -6,7 +6,7 @@
         <Nullable>enable</Nullable>
         <AssemblyVersion></AssemblyVersion>
         <FileVersion></FileVersion>
-        <PackageVersion>0.1.0-beta.1</PackageVersion>
+        <PackageVersion>0.1.0-beta.3</PackageVersion>
         <Title>FitConnect SDK</Title>
     </PropertyGroup>
 
diff --git a/FitConnect/Subscriber.cs b/FitConnect/Subscriber.cs
index f647dc848cdd7fa71454142b1f1870b5c60bbcf3..4cefc183451354ae66d510780eaed2d587f3aed3 100644
--- a/FitConnect/Subscriber.cs
+++ b/FitConnect/Subscriber.cs
@@ -180,8 +180,8 @@ public class Subscriber : FitConnectClient,
         // TODO get data schema for data
         string? dataSchema = null;
         if (dataSchema != null) {
-            if (destinationService.SubmissionSchemas.Select(s => s.SchemaUri)
-                .Contains(dataSchema)) {
+            if (destinationService.SubmissionSchemas != null && destinationService.SubmissionSchemas.Select(s => s.SchemaUri)
+                    .Contains(dataSchema)) {
             }
         }
 
diff --git a/IntegrationTests/Sender/SenderTestHappyPath.cs b/IntegrationTests/Sender/SenderTestHappyPath.cs
index b8f0f7d46de4c98f626a3fd0b622b03c5227f63e..0835df9794499caf2590f16666f25f95950f863f 100644
--- a/IntegrationTests/Sender/SenderTestHappyPath.cs
+++ b/IntegrationTests/Sender/SenderTestHappyPath.cs
@@ -78,7 +78,8 @@ public class SenderTestHappyPath : SenderTestBase {
         var dut = Sender
             .WithDestination(DestinationId)
             .WithServiceType("ServiceName", "urn:de:fim:leika:leistung:99400048079000")
-            .WithAttachments(attachments);
+            .WithAttachments(attachments)
+            .WithJsonData("{\"test\" : \"value\"}");
 
         // Act
         dut.Submit();