diff --git a/libsession/src/main/java/org/session/libsession/messaging/jobs/AttachmentUploadJob.kt b/libsession/src/main/java/org/session/libsession/messaging/jobs/AttachmentUploadJob.kt
index b8e5c9fb7e..9d50e96a98 100644
--- a/libsession/src/main/java/org/session/libsession/messaging/jobs/AttachmentUploadJob.kt
+++ b/libsession/src/main/java/org/session/libsession/messaging/jobs/AttachmentUploadJob.kt
@@ -140,7 +140,7 @@ class AttachmentUploadJob(val attachmentID: Long, val threadID: String, val mess
         val kryo = Kryo()
         kryo.isRegistrationRequired = false
         val serializedMessage = ByteArray(4096)
-        val output = Output(serializedMessage)
+        val output = Output(serializedMessage, Job.MAX_BUFFER_SIZE)
         kryo.writeClassAndObject(output, message)
         output.close()
         return Data.Builder()