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/package.json b/package.json
index 7397399..58280d9 100644
--- a/package.json
+++ b/package.json
@@ -26,12 +26,12 @@
     "hmac"
   ],
   "author": "Dmitry Chestnykh",
-  "license": "Public domain",
+  "license": "Unlicense",
   "devDependencies": {
     "faucet": "0.x.x",
     "tape": "2.x.x",
     "tslint": "^3.6.0",
-    "typescript": "^1.8.9",
-    "uglify-js": "2.x.x"
+    "typescript": "^2.6.1",
+    "uglify-js": "^3.1.9"
   }
 }
diff --git a/yarn.lock b/yarn.lock
new file mode 100644
index 0000000..3d11be9
--- /dev/null
+++ b/yarn.lock
@@ -0,0 +1,308 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+balanced-match@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
+
+brace-expansion@^1.1.7:
+  version "1.1.8"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.8.tgz#c07b211c7c952ec1f8efd51a77ef0d1d3990a292"
+  dependencies:
+    balanced-match "^1.0.0"
+    concat-map "0.0.1"
+
+colors@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/colors/-/colors-1.1.2.tgz#168a4701756b6a7f51a12ce0c97bfa28c084ed63"
+
+commander@~2.11.0:
+  version "2.11.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.11.0.tgz#157152fd1e7a6c8d98a5b715cf376df928004563"
+
+concat-map@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
+
+core-util-is@~1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
+
+deep-equal@~0.1.0:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/deep-equal/-/deep-equal-0.1.2.tgz#b246c2b80a570a47c11be1d9bd1070ec878b87ce"
+
+deep-equal@~0.2.0:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/deep-equal/-/deep-equal-0.2.2.tgz#84b745896f34c684e98f2ce0e42abaf43bba017d"
+
+defined@0.0.0, defined@~0.0.0:
+  version "0.0.0"
+  resolved "https://registry.yarnpkg.com/defined/-/defined-0.0.0.tgz#f35eea7d705e933baf13b2f03b3f83d921403b3e"
+
+diff@^2.2.1:
+  version "2.2.3"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-2.2.3.tgz#60eafd0d28ee906e4e8ff0a52c1229521033bf99"
+
+duplexer@~0.1.1:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/duplexer/-/duplexer-0.1.1.tgz#ace6ff808c1ce66b57d1ebf97977acb02334cfc1"
+
+faucet@0.x.x:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/faucet/-/faucet-0.0.1.tgz#597dcf1d2189a2c062321b591e8f151ed2039d9c"
+  dependencies:
+    defined "0.0.0"
+    duplexer "~0.1.1"
+    minimist "0.0.5"
+    sprintf "~0.1.3"
+    tap-parser "~0.4.0"
+    tape "~2.3.2"
+    through2 "~0.2.3"
+
+findup-sync@~0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/findup-sync/-/findup-sync-0.3.0.tgz#37930aa5d816b777c03445e1966cc6790a4c0b16"
+  dependencies:
+    glob "~5.0.0"
+
+fs.realpath@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
+
+glob@^3.2.9:
+  version "3.2.11"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-3.2.11.tgz#4a973f635b9190f715d10987d5c00fd2815ebe3d"
+  dependencies:
+    inherits "2"
+    minimatch "0.3"
+
+glob@^7.0.3:
+  version "7.1.2"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^3.0.4"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
+glob@~5.0.0:
+  version "5.0.15"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-5.0.15.tgz#1bc936b9e02f4a603fcc222ecf7633d30b8b93b1"
+  dependencies:
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "2 || 3"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
+has@~0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/has/-/has-0.0.1.tgz#66639c14eaf559f139da2be0e438910ef3fd5b1b"
+
+inflight@^1.0.4:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/inflight/-/inflight-1.0.6.tgz#49bd6331d7d02d0c09bc910a1075ba8165b56df9"
+  dependencies:
+    once "^1.3.0"
+    wrappy "1"
+
+inherits@2, inherits@^2.0.1, inherits@~2.0.1:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
+
+isarray@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/isarray/-/isarray-0.0.1.tgz#8a18acfca9a8f4177e09abfc6038939b05d1eedf"
+
+jsonify@~0.0.0:
+  version "0.0.0"
+  resolved "https://registry.yarnpkg.com/jsonify/-/jsonify-0.0.0.tgz#2c74b6ee41d93ca51b7b5aaee8f503631d252a73"
+
+lru-cache@2:
+  version "2.7.3"
+  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.7.3.tgz#6d4524e8b955f95d4f5b58851ce21dd72fb4e952"
+
+minimatch@0.3:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-0.3.0.tgz#275d8edaac4f1bb3326472089e7949c8394699dd"
+  dependencies:
+    lru-cache "2"
+    sigmund "~1.0.0"
+
+"minimatch@2 || 3", minimatch@^3.0.4:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
+  dependencies:
+    brace-expansion "^1.1.7"
+
+minimist@0.0.5:
+  version "0.0.5"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.5.tgz#d7aa327bcecf518f9106ac6b8f003fa3bcea8566"
+
+minimist@~0.0.1:
+  version "0.0.10"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.10.tgz#de3f98543dbf96082be48ad1a0c7cda836301dcf"
+
+object-inspect@^1.0.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/object-inspect/-/object-inspect-1.4.0.tgz#7bcd84fd8db2e833285282bf8356ed87dcef7cf8"
+
+object-keys@~0.4.0:
+  version "0.4.0"
+  resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-0.4.0.tgz#28a6aae7428dd2c3a92f3d95f21335dd204e0336"
+
+once@^1.3.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
+  dependencies:
+    wrappy "1"
+
+optimist@~0.6.0:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/optimist/-/optimist-0.6.1.tgz#da3ea74686fa21a19a111c326e90eb15a0196686"
+  dependencies:
+    minimist "~0.0.1"
+    wordwrap "~0.0.2"
+
+path-is-absolute@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/path-is-absolute/-/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
+
+path-parse@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.5.tgz#3c1adf871ea9cd6c9431b6ea2bd74a0ff055c4c1"
+
+readable-stream@~1.1.11, readable-stream@~1.1.9:
+  version "1.1.14"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.1.14.tgz#7cf4c54ef648e3813084c636dd2079e166c081d9"
+  dependencies:
+    core-util-is "~1.0.0"
+    inherits "~2.0.1"
+    isarray "0.0.1"
+    string_decoder "~0.10.x"
+
+resolve@^1.1.7:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.5.0.tgz#1f09acce796c9a762579f31b2c1cc4c3cddf9f36"
+  dependencies:
+    path-parse "^1.0.5"
+
+resumer@~0.0.0:
+  version "0.0.0"
+  resolved "https://registry.yarnpkg.com/resumer/-/resumer-0.0.0.tgz#f1e8f461e4064ba39e82af3cdc2a8c893d076759"
+  dependencies:
+    through "~2.3.4"
+
+sigmund@~1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/sigmund/-/sigmund-1.0.1.tgz#3ff21f198cad2175f9f3b781853fd94d0d19b590"
+
+source-map@~0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
+
+sprintf-js@^1.0.3:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.1.1.tgz#36be78320afe5801f6cea3ee78b6e5aab940ea0c"
+
+sprintf@~0.1.3:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/sprintf/-/sprintf-0.1.5.tgz#8f83e39a9317c1a502cb7db8050e51c679f6edcf"
+
+string_decoder@~0.10.x:
+  version "0.10.31"
+  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"
+
+tap-parser@~0.4.0:
+  version "0.4.3"
+  resolved "https://registry.yarnpkg.com/tap-parser/-/tap-parser-0.4.3.tgz#a4eae190c10d76c7a111921ff38bbe4d58f09eea"
+  dependencies:
+    inherits "~2.0.1"
+    readable-stream "~1.1.11"
+
+tape@2.x.x:
+  version "2.14.1"
+  resolved "https://registry.yarnpkg.com/tape/-/tape-2.14.1.tgz#8f6eb2dd03b750aa056a8de01a5445e59f7c9cce"
+  dependencies:
+    deep-equal "~0.2.0"
+    defined "~0.0.0"
+    glob "^3.2.9"
+    has "~0.0.1"
+    inherits "^2.0.1"
+    object-inspect "^1.0.0"
+    resumer "~0.0.0"
+    through "^2.3.4"
+
+tape@~2.3.2:
+  version "2.3.3"
+  resolved "https://registry.yarnpkg.com/tape/-/tape-2.3.3.tgz#2e7ce0a31df09f8d6851664a71842e0ca5057af7"
+  dependencies:
+    deep-equal "~0.1.0"
+    defined "~0.0.0"
+    inherits "~2.0.1"
+    jsonify "~0.0.0"
+    resumer "~0.0.0"
+    through "~2.3.4"
+
+through2@~0.2.3:
+  version "0.2.3"
+  resolved "https://registry.yarnpkg.com/through2/-/through2-0.2.3.tgz#eb3284da4ea311b6cc8ace3653748a52abf25a3f"
+  dependencies:
+    readable-stream "~1.1.9"
+    xtend "~2.1.1"
+
+through@^2.3.4, through@~2.3.4:
+  version "2.3.8"
+  resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
+
+tslint@^3.6.0:
+  version "3.15.1"
+  resolved "https://registry.yarnpkg.com/tslint/-/tslint-3.15.1.tgz#da165ca93d8fdc2c086b51165ee1bacb48c98ea5"
+  dependencies:
+    colors "^1.1.2"
+    diff "^2.2.1"
+    findup-sync "~0.3.0"
+    glob "^7.0.3"
+    optimist "~0.6.0"
+    resolve "^1.1.7"
+    underscore.string "^3.3.4"
+
+typescript@^2.6.1:
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.6.1.tgz#ef39cdea27abac0b500242d6726ab90e0c846631"
+
+uglify-js@^3.1.9:
+  version "3.1.9"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.1.9.tgz#dffca799308cf327ec3ac77eeacb8e196ce3b452"
+  dependencies:
+    commander "~2.11.0"
+    source-map "~0.6.1"
+
+underscore.string@^3.3.4:
+  version "3.3.4"
+  resolved "https://registry.yarnpkg.com/underscore.string/-/underscore.string-3.3.4.tgz#2c2a3f9f83e64762fdc45e6ceac65142864213db"
+  dependencies:
+    sprintf-js "^1.0.3"
+    util-deprecate "^1.0.2"
+
+util-deprecate@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
+
+wordwrap@~0.0.2:
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.3.tgz#a3d5da6cd5c0bc0008d37234bbaf1bed63059107"
+
+wrappy@1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
+
+xtend@~2.1.1:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/xtend/-/xtend-2.1.2.tgz#6efecc2a4dad8e6962c4901b337ce7ba87b5d28b"
+  dependencies:
+    object-keys "~0.4.0"