diff --git a/webknossos/Changelog.md b/webknossos/Changelog.md
index a7904564d..642490728 100644
--- a/webknossos/Changelog.md
+++ b/webknossos/Changelog.md
@@ -17,6 +17,7 @@ For upgrade instructions, please check the respective _Breaking Changes_ section
 ### Added
 
 ### Changed
+- Disabled conditional writes for S3 buckets in tensorstore. [#1368](https://github.com/scalableminds/webknossos-libs/pull/1368)
 
 ### Fixed
 - Fixed that some operations that need an authentication token didn’t ask for it but just failed. [#1366](https://github.com/scalableminds/webknossos-libs/pull/1366)
diff --git a/webknossos/webknossos/dataset/_array.py b/webknossos/webknossos/dataset/_array.py
index 506563474..00786c1d6 100644
--- a/webknossos/webknossos/dataset/_array.py
+++ b/webknossos/webknossos/dataset/_array.py
@@ -547,6 +547,7 @@ def _make_kvstore(path: UPath) -> str | dict[str, str | list[str]]:
                 "driver": "s3",
                 "path": parsed_url.path.lstrip("/"),
                 "bucket": parsed_url.netloc,
+                "use_conditional_write": False,
             }
             if endpoint_url := path.storage_options.get("client_kwargs", {}).get(
                 "endpoint_url", None