add upgrade docs
@@ -22,6 +22,14 @@ Dropped Support for CUDA 7.0 / 7.5
CuPy v5 no longer supports CUDA 7.0 / 7.5.
+Update of Docker Images
+-----------------------
+
+CuPy official Docker images (see :doc:`install` for details) are now updated to use CUDA 9.2 and cuDNN 7.
+
+To use these images, you may need to upgrade the NVIDIA driver on your host.
+See `Requirements of nvidia-docker <https://github.com/NVIDIA/nvidia-docker/wiki/CUDA#requirements>`_ for details.
+
CuPy v4
=======
