diff --git a/EnvelopeGenerator.API/Controllers/DocumentController.cs b/EnvelopeGenerator.API/Controllers/DocumentController.cs
index 41d43fc2..37d3a0a3 100644
--- a/EnvelopeGenerator.API/Controllers/DocumentController.cs
+++ b/EnvelopeGenerator.API/Controllers/DocumentController.cs
@@ -87,8 +87,10 @@ public class DocumentController(IMediator mediator, IAuthorizationService authSe
 
         var senderDoc = await mediator.Send(new ReadDocumentQuery() { EnvelopeId = envelopeId }, cancel);
 
-        return senderDoc.ByteData is byte[] senderDocByte
-            ? File(senderDocByte, "application/octet-stream")
-            : NotFound("Document is empty.");
+        if (senderDoc.ByteData is not byte[] senderDocByte)
+            return NotFound("Document is empty.");
+
+        Response.Headers.ContentDisposition = $"inline; filename=\"{envelopeKey}.pdf\"";
+        return File(senderDocByte, "application/pdf");
     }
-}
\ No newline at end of file
+}