diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..91e234e
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,75 @@
+version: 2
+
+refs:
+  container: &container
+    docker:
+      - image: node:10
+    working_directory: ~/repo
+  steps:
+    - &Versions
+      run:
+        name: Versions
+        command: node -v && npm -v && yarn -v
+    - &Install
+      run:
+        name: Install Dependencies
+        command: yarn install --frozen-lockfile
+    - &Test
+      run:
+        name: Test
+        command: yarn test
+
+jobs:
+  test:
+    <<: *container
+    steps:
+      - checkout
+      - *Versions
+      - *Install
+      - *Test
+
+  publish:
+    <<: *container
+    steps:
+      - checkout
+      - *Versions
+      - *Install
+      - *Test
+      - run:
+          name: NPM Auth
+          command: echo "//registry.npmjs.org/:_authToken=${NPM_TOKEN}" > ~/.npmrc
+      - run:
+          name: Release
+          command: |
+            npx semantic-release && \
+            npx cross-ci :run \
+                npx commit-status success Version "'\${PROJECT_VERSION}'"
+
+workflows:
+  version: 2
+  all:
+    jobs:
+      - test:
+          context: common-env
+          filters:
+            branches:
+              ignore:
+                - master
+                - gh-pages
+  master:
+    jobs:
+      - publish:
+          context: common-env
+          filters:
+            branches:
+              only: master
+  monthly:
+    triggers:
+      - schedule:
+          cron: '0 0 1 * *'
+          filters:
+            branches:
+              only: master
+    jobs:
+      - test:
+          context: common-env
\ No newline at end of file
diff --git a/.npmignore b/.npmignore
deleted file mode 100644
index fcfd944..0000000
--- a/.npmignore
+++ /dev/null
@@ -1,4 +0,0 @@
-node_modules
-test
-.gitignore
-.travis.yml
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index eda544a..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,8 +0,0 @@
-language: node_js
-node_js:
-  - "0.8"
-  - "0.10"
-  - "0.12"
-before_install:
-  - '[ "${TRAVIS_NODE_VERSION}" != "0.8" ] || npm install -g npm@1.4.28'
-  - npm install -g npm
diff --git a/package.json b/package.json
index 64d5167..2b4ec36 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,9 @@
   "name": "sha",
   "version": "2.0.1",
   "description": "Check and get file hashes",
+  "files": [
+    "index.js"
+  ],
   "scripts": {
     "test": "mocha -R spec"
   },
diff --git a/yarn.lock b/yarn.lock
new file mode 100644
index 0000000..3c04be4
--- /dev/null
+++ b/yarn.lock
@@ -0,0 +1,121 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+commander@0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-0.6.1.tgz#fa68a14f6a945d54dbbe50d8cdb3320e9e3b1a06"
+  integrity sha1-+mihT2qUXVTbvlDYzbMyDp47GgY=
+
+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"
+  integrity sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=
+
+debug@*:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
+  integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
+  dependencies:
+    ms "^2.1.1"
+
+diff@1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-1.0.2.tgz#4ae73f1aee8d6fcf484f1a1ce77ce651d9b7f0c9"
+  integrity sha1-Suc/Gu6Nb89ITxoc53zmUdm38Mk=
+
+graceful-fs@^4.1.2:
+  version "4.1.15"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.15.tgz#ffb703e1066e8a0eeaa4c8b80ba9253eeefbfb00"
+  integrity sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA==
+
+growl@1.7.x:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/growl/-/growl-1.7.0.tgz#de2d66136d002e112ba70f3f10c31cf7c350b2da"
+  integrity sha1-3i1mE20ALhErpw8/EMMc98NQsto=
+
+inherits@~2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
+  integrity sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=
+
+isarray@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
+  integrity sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE=
+
+jade@0.26.3:
+  version "0.26.3"
+  resolved "https://registry.yarnpkg.com/jade/-/jade-0.26.3.tgz#8f10d7977d8d79f2f6ff862a81b0513ccb25686c"
+  integrity sha1-jxDXl32NefL2/4YqgbBRPMslaGw=
+  dependencies:
+    commander "0.6.1"
+    mkdirp "0.3.0"
+
+mkdirp@0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.3.0.tgz#1bbf5ab1ba827af23575143490426455f481fe1e"
+  integrity sha1-G79asbqCevI1dRQ0kEJkVfSB/h4=
+
+mkdirp@0.3.3:
+  version "0.3.3"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.3.3.tgz#595e251c1370c3a68bab2136d0e348b8105adf13"
+  integrity sha1-WV4lHBNww6aLqyE20ONIuBBa3xM=
+
+mocha@~1.9.0:
+  version "1.9.0"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-1.9.0.tgz#141054b13cb03ce5ce59aece3d65d5ca01b8df0a"
+  integrity sha1-FBBUsTywPOXOWa7OPWXVygG43wo=
+  dependencies:
+    commander "0.6.1"
+    debug "*"
+    diff "1.0.2"
+    growl "1.7.x"
+    jade "0.26.3"
+    mkdirp "0.3.3"
+    ms "0.3.0"
+
+ms@0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-0.3.0.tgz#03edc348d613e66a56486cfdac53bcbe899cbd61"
+  integrity sha1-A+3DSNYT5mpWSGz9rFO8vomcvWE=
+
+ms@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
+  integrity sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==
+
+process-nextick-args@~2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-2.0.0.tgz#a37d732f4271b4ab1ad070d35508e8290788ffaa"
+  integrity sha512-MtEC1TqN0EU5nephaJ4rAtThHtC86dNN9qCuEhtshvpVBkAW5ZO7BASN9REnF9eoXGcRub+pFuKEpOHE+HbEMw==
+
+readable-stream@^2.0.2:
+  version "2.3.6"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.6.tgz#b11c27d88b8ff1fbe070643cf94b0c79ae1b0aaf"
+  integrity sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==
+  dependencies:
+    core-util-is "~1.0.0"
+    inherits "~2.0.3"
+    isarray "~1.0.0"
+    process-nextick-args "~2.0.0"
+    safe-buffer "~5.1.1"
+    string_decoder "~1.1.1"
+    util-deprecate "~1.0.1"
+
+safe-buffer@~5.1.0, safe-buffer@~5.1.1:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
+  integrity sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
+
+string_decoder@~1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.1.1.tgz#9cf1611ba62685d7030ae9e4ba34149c3af03fc8"
+  integrity sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==
+  dependencies:
+    safe-buffer "~5.1.0"
+
+util-deprecate@~1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
+  integrity sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=