diff --git a/plugins/flux/openapi.json b/plugins/flux/openapi.json
index c8d970f..979d2db 100644
--- a/plugins/flux/openapi.json
+++ b/plugins/flux/openapi.json
@@ -116,7 +116,7 @@
       "ImageToImageInputs": {
         "title": "ImageToImageInputs",
         "type": "object",
-        "required": ["prompt", "image_size", "num_inference_steps", "guidance_scale"],
+        "required": ["image_url", "prompt", "image_size", "num_inference_steps", "guidance_scale"],
         "properties": {
           "image_url": {
             "type": "string",