diff --git a/requirements.txt b/requirements.txt
index ae22b333..7de6119b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ inflect==5.6.0
 tqdm
 anyascii
 pyyaml
-fsspec>=2021.04.0
+fsspec==2023.6.0 # <= 2023.9.1 makes aux tests fail
 aiohttp
 packaging
 # deps for examples