diff --git a/src/label_studio_sdk/converter/imports/coco.py b/src/label_studio_sdk/converter/imports/coco.py
index 6e987dc31..af9c76f5d 100644
--- a/src/label_studio_sdk/converter/imports/coco.py
+++ b/src/label_studio_sdk/converter/imports/coco.py
@@ -22,7 +22,7 @@ def new_task(out_type, root_url, file_name):
         dict: Label Studio task structure with image data and empty result array
     """
     return {
-        "data": {"image": os.path.join(root_url, file_name)},
+        "data": {"image": root_url + file_name},
         # 'annotations' or 'predictions'
         out_type: [
             {