diff --git a/README.md b/README.md
index cccaf83..382fb7f 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,8 @@ Please cite and credit FlashAttention if you use it.
 Requirements:
 - CUDA 11.6 and above.
 - PyTorch 1.12 and above.
+- Linux. Windows is not supported for now. If you have ideas on how to modify
+  the code to support Windows, please reach out via Github issue.
 
 We recommend the
 [Pytorch](https://catalog.ngc.nvidia.com/orgs/nvidia/containers/pytorch)