diff --git a/application/api/image_processing.py b/application/api/image_processing.py
index 2f59340..2a3651d 100644
--- a/application/api/image_processing.py
+++ b/application/api/image_processing.py
@@ -30,6 +30,8 @@ async def process_image(image: bytes) -> str:
     if cars == []:
         return ""
     # Get the biggest car box
+    if not cars:
+        return ""
     size, corners = max(cars, key=lambda x: x[0])
 
     # Crop biggest car