diff --git a/app/api/views/__init__.py b/app/api/views/__init__.py
index c851c30c..1210f02f 100644
--- a/app/api/views/__init__.py
+++ b/app/api/views/__init__.py
@@ -9,5 +9,5 @@ from .project import *
 from .role import *
 from .statistics import *
 from .task import *
-from .user import *
 from .upload import *
+from .user import *
diff --git a/app/api/views/upload/catalog.py b/app/api/views/upload/catalog.py
index 56a4e8c2..795bebf6 100644
--- a/app/api/views/upload/catalog.py
+++ b/app/api/views/upload/catalog.py
@@ -2,8 +2,10 @@ from collections import defaultdict
 from typing import Dict, List, Type
 
 from pydantic import BaseModel
+from typing_extensions import Literal
+
+from ...models import DOCUMENT_CLASSIFICATION, SEQ2SEQ, SEQUENCE_LABELING
 
-from ...models import DOCUMENT_CLASSIFICATION, SEQUENCE_LABELING, SEQ2SEQ
 CSV = 'CSV'
 FastText = 'fastText'
 JSON = 'JSON'
@@ -18,7 +20,7 @@ class OptionColumn(BaseModel):
 
 
 class OptionDelimiter(OptionColumn):
-    delimiter: str = ','
+    delimiter: Literal[',', '\t', ';', '|', ' '] = ','
 
 
 class OptionNone(BaseModel):
diff --git a/app/api/views/upload/dataset.py b/app/api/views/upload/dataset.py
index 24f930bf..8a813094 100644
--- a/app/api/views/upload/dataset.py
+++ b/app/api/views/upload/dataset.py
@@ -118,7 +118,7 @@ class CsvDataset(Dataset):
 
             column_data = self.kwargs.get('column_data', 'text')
             if column_data not in header:
-                message = f'{column_data} does not exist in the header: {header}'
+                message = f'Column `{column_data}` does not exist in the header: {header}'
                 raise FileParseException(filename, 1, message)
 
             for line_num, row in enumerate(reader, start=2):
diff --git a/app/api/views/upload/factory.py b/app/api/views/upload/factory.py
index ca714000..7b5bfd42 100644
--- a/app/api/views/upload/factory.py
+++ b/app/api/views/upload/factory.py
@@ -1,5 +1,5 @@
-from . import data, dataset, label, catalog
-from ...models import DOCUMENT_CLASSIFICATION, SEQUENCE_LABELING, SEQ2SEQ
+from ...models import DOCUMENT_CLASSIFICATION, SEQ2SEQ, SEQUENCE_LABELING
+from . import catalog, data, dataset, label
 
 
 def get_data_class(project_type: str):
diff --git a/app/api/views/upload/view.py b/app/api/views/upload/view.py
index ca4568e5..5352e4a0 100644
--- a/app/api/views/upload/view.py
+++ b/app/api/views/upload/view.py
@@ -6,10 +6,10 @@ from rest_framework.permissions import IsAuthenticated
 from rest_framework.response import Response
 from rest_framework.views import APIView
 
-from .catalog import Options
 from ...models import Project
 from ...permissions import IsProjectAdmin
 from ...tasks import injest_data
+from .catalog import Options
 
 
 class DatasetCatalog(APIView):
@@ -27,8 +27,8 @@ class UploadAPI(APIView):
 
     def post(self, request, *args, **kwargs):
         project_id = self.kwargs['project_id']
-        upload_ids = request.data['uploadIds']
-        format = request.data['format']
+        upload_ids = request.data.pop('uploadIds')
+        format = request.data.pop('format')
 
         tus = [TemporaryUpload.objects.get(upload_id=upload_id) for upload_id in upload_ids]
         sus = [store_upload(tu.upload_id, destination_file_path=tu.upload_name) for tu in tus]
@@ -37,6 +37,7 @@ class UploadAPI(APIView):
             user_id=request.user.id,
             project_id=project_id,
             filenames=filenames,
-            format=format
+            format=format,
+            **request.data
         )
         return Response({'task_id': task.task_id})