diff --git a/var/spack/repos/builtin/packages/py-ujson/package.py b/var/spack/repos/builtin/packages/py-ujson/package.py
new file mode 100644
index 0000000000..45e9b280e8
--- /dev/null
+++ b/var/spack/repos/builtin/packages/py-ujson/package.py
@@ -0,0 +1,18 @@
+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class PyUjson(PythonPackage):
+    """Ultra fast JSON decoder and encoder written in C with Python
+       bindings."""
+
+    homepage = "https://github.com/esnme/ultrajson"
+    url      = "https://pypi.io/packages/source/u/ujson/ujson-1.35.tar.gz"
+
+    version('1.35', sha256='f66073e5506e91d204ab0c614a148d5aa938bdbf104751be66f8ad7a222f5f86')
+
+    depends_on('py-setuptools', type='build')