diff --git a/ui/gradio_ui.py b/ui/gradio_ui.py
index b5edb92..b07ec6a 100644
--- a/ui/gradio_ui.py
+++ b/ui/gradio_ui.py
@@ -16,7 +16,7 @@ class GenerateUI:
 
     def get_presets(self):
         if not os.path.exists("local/presets.json"):
-            with open("local/presets.json", "w") as f:
+            with open("local/presets.json", "wb") as f:
                 f.write(orjson.dumps({}))
         with open("local/presets.json", "r") as f:
             return orjson.loads(f.read())