diff --git a/src/objectifier.py b/src/objectifier.py
index be10d01..744b1a4 100644
--- a/src/objectifier.py
+++ b/src/objectifier.py
@@ -117,7 +117,7 @@ def analyze_image(request: Request, image: UploadFile):
     infile = open(incoming_dir / image.filename)
     file_hash = hashlib.sha256()
     file_hash.update(image)
-    with open(infile, "wb") as f:
+    with open(infile, "wxb") as f:
         chunk = image.read(buffer_size)
         while chunk:
             print ("writing " + buffer_size + " bytes")