diff --git a/api/onnx_web/convert/__main__.py b/api/onnx_web/convert/__main__.py
index 8adc8370..272a1aac 100644
--- a/api/onnx_web/convert/__main__.py
+++ b/api/onnx_web/convert/__main__.py
@@ -546,7 +546,7 @@ def convert_models(conversion: ConversionContext, args, models: Models):
         logger.error("error while converting models: %s", model_errors)
 
 
-def main() -> int:
+def main(args = None) -> int:
     parser = ArgumentParser(
         prog="onnx-web model converter", description="convert checkpoint models to ONNX"
     )
@@ -582,7 +582,7 @@ def main() -> int:
         help="HuggingFace token with read permissions for downloading models.",
     )
 
-    args = parser.parse_args()
+    args = args or parser.parse_args()
     logger.info("CLI arguments: %s", args)
 
     server = ConversionContext.from_environ()
diff --git a/api/onnx_web/server/admin.py b/api/onnx_web/server/admin.py
index 67a40676..ac106e9d 100644
--- a/api/onnx_web/server/admin.py
+++ b/api/onnx_web/server/admin.py
@@ -48,9 +48,10 @@ def update_extra_models(server: ServerContext):
         return make_response(jsonify({})), 401
 
     extra_schema = load_config("./schemas/extras.yaml")
+    data_str = request.data.decode(encoding=request.content_encoding)
 
     try:
-        data = load_config_str(request.data)
+        data = load_config_str(data_str)
         try:
             validate(data, extra_schema)
         except ValidationError:
@@ -60,11 +61,13 @@ def update_extra_models(server: ServerContext):
 
     # TODO: make a backup
     with open(server.extra_models[0], mode="w") as f:
-        f.write(request.data)
+        f.write(data_str)
 
+    from argparse import Namespace
     from onnx_web.convert.__main__ import main as convert
+
     logger.warning("downloading and converting models to ONNX")
-    convert()
+    convert(args=Namespace(correction=True, diffusion=True, upscalinng=True, extras=server.extra_models))
 
     return jsonify(data)