diff --git a/src/Server/FileTime.Server.Common/Connections/SignalR/SignalRConnection.cs b/src/Server/FileTime.Server.Common/Connections/SignalR/SignalRConnection.cs
index 9659a4a..8ec3c94 100644
--- a/src/Server/FileTime.Server.Common/Connections/SignalR/SignalRConnection.cs
+++ b/src/Server/FileTime.Server.Common/Connections/SignalR/SignalRConnection.cs
@@ -69,7 +69,7 @@ public class SignalRConnection : IRemoteConnection, IAsyncInitable<string>
         => await _client.MoveItemAsync(contentProviderId, fullName.Path, newPath.Path);
 
     public async Task WriteBytesAsync(string transactionId, byte[] data, int? index)
-        => await _client.WriteBytesAsync(transactionId, Encoding.UTF8.GetString(data), index ?? -1);
+        => await _client.WriteBytesAsync(transactionId, Convert.ToBase64String(data), index ?? -1);
 
     public async Task FlushWriterAsync(string transactionId)
         => await _client.FlushWriterAsync(transactionId);
diff --git a/src/Server/FileTime.Server.Web/ConnectionHub.cs b/src/Server/FileTime.Server.Web/ConnectionHub.cs
index a07cf31..604dd72 100644
--- a/src/Server/FileTime.Server.Web/ConnectionHub.cs
+++ b/src/Server/FileTime.Server.Web/ConnectionHub.cs
@@ -74,8 +74,8 @@ public class ConnectionHub : Hub<ISignalRClient>, ISignalRHub
         _contentAccessManager.AddContentWriter(transactionId, contentWriter);
     }
 
-    public async Task WriteBytesAsync(string transactionId, string data, int index) 
-        => await _contentAccessManager.GetContentWriter(transactionId).WriteBytesAsync(Encoding.UTF8.GetBytes(data), index == -1 ? null : index);
+    public async Task WriteBytesAsync(string transactionId, string data, int index)
+        => await _contentAccessManager.GetContentWriter(transactionId).WriteBytesAsync(Convert.FromBase64String(data), index == -1 ? null : index);
 
     public async Task FlushWriterAsync(string transactionId)
         => await _contentAccessManager.GetContentWriter(transactionId).FlushAsync();