diff --git a/README.md b/README.md
index d05a771..5633737 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,9 @@ Setting `NUM_PROCESS` to 0 will use the serialization mode where each client tra
 Setting `NUM_PROCESS > 0` will use the parallel mode where `NUM_PROCESS` workers consume the clients tasks in parallel.
 The recommended value for `NUM_PROCESS` is the number of **CPU cores** available.
 
+#### Notice on Windows
+Multiprocessing with CUDA is ***not supported on Windows***. If you are using Windows, you should set `NUM_PROCESS` to 0 to use the serialization mode with CUDA. Or you are free to use the parallel mode with CPU only.
+
 ## Acknowledgement
 - This project includes code from [easydict](https://github.com/makinacorpus/easydict), licensed under the GNU Lesser General Public License (LGPL) version 3.0.
 See the [easydict's LICENSE](https://github.com/makinacorpus/easydict?tab=LGPL-3.0-1-ov-file) for details.
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