diff --git a/webknossos/Changelog.md b/webknossos/Changelog.md
index 929a5c4e9..08909b870 100644
--- a/webknossos/Changelog.md
+++ b/webknossos/Changelog.md
@@ -19,6 +19,7 @@ For upgrade instructions, please check the respective _Breaking Changes_ section
 ### Changed
 
 ### Fixed
+- Performing `webknossos upload` on a windows machine leaded to loss of directory structure due to backslashes in the relative paths. This was fixed by [1067](https://github.com/scalableminds/webknossos-libs/pull/1067)
 
 
 ## [0.14.21](https://github.com/scalableminds/webknossos-libs/releases/tag/v0.14.21) - 2024-05-07
diff --git a/webknossos/webknossos/client/_upload_dataset.py b/webknossos/webknossos/client/_upload_dataset.py
index 670b6c7de..e03ffe17a 100644
--- a/webknossos/webknossos/client/_upload_dataset.py
+++ b/webknossos/webknossos/client/_upload_dataset.py
@@ -152,7 +152,7 @@ def upload_dataset(
             },
             chunk_size=100 * 1024 * 1024,  # 100 MiB
             generate_unique_identifier=lambda _,
-            relative_path: f"{upload_id}/{relative_path}",
+            relative_path: f"{upload_id}/{relative_path.as_posix()}",
             test_chunks=False,
             permanent_errors=[400, 403, 404, 409, 415, 500, 501],
             client=httpx.Client(timeout=None),