diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..cf1ab25
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,24 @@
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org>
diff --git a/README.md b/README.md
index d89c97a..108c949 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,9 @@ Note that there's currently [no proof](http://crypto.stackexchange.com/a/3311/29
 that this is safe to do. It is safer to share both Ed25519 and Curve25519
 public keys (their concatenation is 64 bytes long).
 
-Written by Dmitry Chestnykh in 2014. Public domain. No warranty.
+Written by Dmitry Chestnykh in 2014-2016, using public domain code from
+[TweetNaCl.js](https://github.com/dchest/tweetnacl-js). Public domain.
+No warranty.
 
 Thanks to [@CodesInChaos](https://github.com/CodesInChaos) and
 [@nightcracker](https://github.com/nightcracker) for showing how to
diff --git a/bower.json b/bower.json
index 8f8a54e..6944ca6 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "ed2curve",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "authors": [
     "Dmitry Chestnykh <dmitry@codingrobots.com>"
   ],
@@ -24,7 +24,7 @@
   "dependencies": {
     "tweetnacl": "0.x.x"
   },
-  "license": "Public domain",
+  "license": "Unlicense",
   "homepage": "https://github.com/dchest/ed2curve-js",
   "ignore": [
     "**/.*",
diff --git a/package.json b/package.json
index c6ff73e..b70d41d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ed2curve",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "Convert Ed25519 signing keys into Curve25519 Diffie-Hellman keys.",
   "main": "ed2curve.js",
   "directories": {
@@ -26,7 +26,7 @@
     "elliptic"
   ],
   "author": "Dmitry Chestnykh",
-  "license": "Public domain",
+  "license": "Unlicense",
   "bugs": {
     "url": "https://github.com/dchest/ed2curve-js/issues"
   },