diff --git a/app.py b/app.py
index e1e636e..4e56f01 100644
--- a/app.py
+++ b/app.py
@@ -5,7 +5,7 @@ from pathlib import Path
 from typing import Literal, Optional
 import base64
 
-import cv2
+import numpy as np
 import supervision as sv
 import uvicorn
 import yaml
@@ -24,7 +24,7 @@ PROCESSED_FOLDER = Path(os.environ.get("TEMP_IMG_FOLDER", "temp_dir"))
 PROCESSED_FOLDER.mkdir(parents=True, exist_ok=True)
 BASE_URL = "http://127.0.0.1:8000"
 
-API_PARTNER_KEY = os.environ.get("API_PARTNER_KEY", "")
+API_PARTNER_KEY = os.environ.get("API_PARTNER_KEY", "dev-AfghDgr3fgf74vc")
 API_KEY_NAME = "x-api-key"
 api_key_header = APIKeyHeader(name=API_KEY_NAME, auto_error=False)
 
@@ -38,10 +38,14 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
-pdf_converter: PdfConverter = PdfConverter()
+pdf_converter: PdfConverter = PdfConverter(dpi=150)
 grounding_model = Model(
-    model_config_path=os.environ.get("GROUNDING_DINO_CONFIG"),
-    model_checkpoint_path=os.environ.get("GROUNDING_DINO_CHECKPOINT"),
+    model_config_path=os.environ.get(
+        "GROUNDING_DINO_CONFIG", "groundingdino/config/GroundingDINO_SwinT_OGC.py"
+    ),
+    model_checkpoint_path=os.environ.get(
+        "GROUNDING_DINO_CHECKPOINT", "gdino_checkpoints/groundingdino_swint_ogc.pth"
+    ),
     device="cuda:0",
 )
 BOX_THRESHOLD = 0.4
@@ -112,8 +116,8 @@ async def api_key_middleware(request: Request, call_next):
 
 @app.post("/crop_ooi")
 async def crop_object_of_interest(
-    document_file: Optional[UploadFile] = File(
-        None, description="The document to process."
+    document_file: UploadFile = File(
+        ..., description="The document to process."
     ),
     concept_list: Optional[list[str]] = Form(
         ["ID document"], description="List of concepts to detect e.g. dog, cat, rain"
@@ -144,7 +148,7 @@ async def crop_object_of_interest(
         detection_img_list = []
         for image in images:
             detections, labels = grounding_model.predict_with_caption(
-                image=images,
+                image=np.asarray(image),
                 caption=caption,
                 box_threshold=box_threshold,
                 text_threshold=text_threshold,
@@ -158,7 +162,7 @@ async def crop_object_of_interest(
             ]
             for i, bbox in enumerate(detections.xyxy):
                 x_min, y_min, x_max, y_max = tuple(bbox)
-                patch = image[int(y_min) : int(y_max), int(x_min) : int(x_max)]
+                patch = image.crop((int(y_min), int(y_max), int(x_min), int(x_max)))
                 image_json = output_img(processed_img=patch, output=output)
                 image_list.append(image_json)
 
@@ -179,7 +183,7 @@ async def crop_object_of_interest(
 
     except Exception as e:
         print(f"{e}")
-        return JSONResponse(status_code=500, content=str(e))
+        return JSONResponse(status_code=501, content=str(e))
 
 
 if __name__ == "__main__":
diff --git a/pyproject.toml b/pyproject.toml
index 2bb3c73..8e1b235 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,4 +26,5 @@ dependencies = [
     "fastapi>=0.116.1",
     "openai>=1.99.9",
     "starlette>=0.47.2",
+    "python-multipart>=0.0.20",
 ]
diff --git a/uv.lock b/uv.lock
index b209d6d..c688bb3 100644
--- a/uv.lock
+++ b/uv.lock
@@ -268,6 +268,7 @@ dependencies = [
     { name = "pillow" },
     { name = "pip" },
     { name = "pycocotools" },
+    { name = "python-multipart" },
     { name = "setuptools" },
     { name = "starlette" },
     { name = "supervision" },
@@ -293,6 +294,7 @@ requires-dist = [
     { name = "pillow", specifier = ">=9.4.0" },
     { name = "pip", specifier = ">=25.2" },
     { name = "pycocotools", specifier = ">=2.0.10" },
+    { name = "python-multipart", specifier = ">=0.0.20" },
     { name = "setuptools", specifier = ">=80.9.0" },
     { name = "starlette", specifier = ">=0.47.2" },
     { name = "supervision", specifier = ">=0.26.1" },
@@ -1049,6 +1051,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/ec/57/56b9bcc3c9c6a792fcbaf139543cee77261f3651ca9da0c93f5c1221264b/python_dateutil-2.9.0.post0-py2.py3-none-any.whl", hash = "sha256:a8b2bc7bffae282281c8140a97d3aa9c14da0b136dfe83f850eea9a5f7470427", size = 229892, upload-time = "2024-03-01T18:36:18.57Z" },
 ]
 
+[[package]]
+name = "python-multipart"
+version = "0.0.20"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/f3/87/f44d7c9f274c7ee665a29b885ec97089ec5dc034c7f3fafa03da9e39a09e/python_multipart-0.0.20.tar.gz", hash = "sha256:8dd0cab45b8e23064ae09147625994d090fa46f5b0d1e13af944c331a7fa9d13", size = 37158, upload-time = "2024-12-16T19:45:46.972Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/45/58/38b5afbc1a800eeea951b9285d3912613f2603bdf897a4ab0f4bd7f405fc/python_multipart-0.0.20-py3-none-any.whl", hash = "sha256:8a62d3a8335e06589fe01f2a3e178cdcc632f3fbe0d492ad9ee0ec35aab1f104", size = 24546, upload-time = "2024-12-16T19:45:44.423Z" },
+]
+
 [[package]]
 name = "pywin32"
 version = "311"