diff --git a/requirements.txt b/requirements.txt
index 94b2b2bd..d2841f09 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+ray[serve]==1.5.0
 kfserving>=0.6.1
 docker>=3.4.1
 notebook>=5.6.0
diff --git a/setup.py b/setup.py
index f6a4d326..07148b88 100644
--- a/setup.py
+++ b/setup.py
@@ -21,6 +21,7 @@
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.9',
         "License :: OSI Approved :: Apache Software License",
         "Operating System :: OS Independent",
         'Topic :: Scientific/Engineering',