1diff --git b/LICENSE a/LICENSE
2new file mode 100644
3index 0000000..c044775
4--- /dev/null
5+++ a/LICENSE
6@@ -0,0 +1,23 @@
7+Copyright (C) 2018-2019, Cloudflare, Inc.
8+All rights reserved.
9+
10+Redistribution and use in source and binary forms, with or without
11+modification, are permitted provided that the following conditions are met:
12+
13+    * Redistributions of source code must retain the above copyright
14+      notice, this list of conditions and the following disclaimer.
15+
16+    * Redistributions in binary form must reproduce the above copyright
17+      notice, this list of conditions and the following disclaimer in the
18+      documentation and/or other materials provided with the distribution.
19+
20+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
21+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
22+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
23+DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
24+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
27+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30