diff --git a/src/webui/service/main/routes.py b/src/webui/service/main/routes.py
index 38d13aad562f3e55490952db84ef784f87697739..dcbbf71a6fee6ebd040f14c7d0d2cb07ba9ee085 100644
--- a/src/webui/service/main/routes.py
+++ b/src/webui/service/main/routes.py
@@ -34,6 +34,8 @@ slice_client = SliceClient()
 
 LOGGER = logging.getLogger(__name__)
 
+DESCRIPTOR_LOADER_NUM_WORKERS = 10
+
 def process_descriptors(descriptors):
     try:
         descriptors_file = request.files[descriptors.name]
@@ -43,7 +45,7 @@ def process_descriptors(descriptors):
         flash(f'Unable to load descriptor file: {str(e)}', 'danger')
         return
 
-    descriptor_loader = DescriptorLoader(descriptors)
+    descriptor_loader = DescriptorLoader(descriptors, num_workers=DESCRIPTOR_LOADER_NUM_WORKERS)
     results = descriptor_loader.process()
     for message,level in compose_notifications(results):
         if level == 'error': LOGGER.warning('ERROR message={:s}'.format(str(message)))