diff --git a/vectorizing/__init__.py b/vectorizing/__init__.py
index 1abf422..26d04e5 100644
--- a/vectorizing/__init__.py
+++ b/vectorizing/__init__.py
@@ -130,7 +130,7 @@ def index() -> str | Response | tuple[Response, int]:
             timer.end_timer()
 
             if raw:
-                return markup
+                return Response(markup, mimetype="image/svg+xml")
 
             timer.start_timer("Markup Upload")
             cuid_str = upload_markup(markup, S3_BUCKET)
diff --git a/vectorizing/tests/test_api_contracts.py b/vectorizing/tests/test_api_contracts.py
index 4c050c3..c46236a 100644
--- a/vectorizing/tests/test_api_contracts.py
+++ b/vectorizing/tests/test_api_contracts.py
@@ -84,6 +84,7 @@ def test_raw_requests_crop_before_vectorizing_and_do_not_upload(
         },
     )
     assert response.status_code == 200
+    assert response.mimetype == "image/svg+xml"
     assert response.data.startswith(b"<svg ")
     assert b'width="8" height="8"' in response.data
     chosen, unused = (binary, color) if solver == 0 else (color, binary)