diff --git a/requirements_dev_optional.txt b/requirements_dev_optional.txt
index c482742c79..29ec425935 100644
--- a/requirements_dev_optional.txt
+++ b/requirements_dev_optional.txt
@@ -17,7 +17,6 @@ flake8==3.9.2
 pytest-cov==2.12.1
 pytest-doctestplus==0.10.1
 h5py==3.3.0
-s3fs==2021.6.0
+s3fs==2021.8.0
 fsspec==2021.6.0
-aiobotocore!=1.4.0
 moto[server]>=1.3.14