diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..9a9c06a
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,92 @@
+version: 2
+workflows:
+  version: 2
+  tests:
+    jobs: &workflow_jobs
+      - node6:
+          filters:
+            tags:
+              only: /.*/
+      # - node8:
+      #     filters:
+      #       tags:
+      #         only: /.*/
+      # - node10:
+      #     filters:
+      #       tags:
+      #         only: /.*/
+      - lint:
+          requires:
+            - node6
+            # - node8
+            # - node10
+          filters:
+            tags:
+              only: /.*/
+      - system_tests:
+          requires:
+            - lint
+          filters:
+            branches:
+              only: master
+            tags:
+              only: '/^v[\d.]+$/'
+      - publish_npm:
+          requires:
+            - system_tests
+          filters:
+            branches:
+              ignore: /.*/
+            tags:
+              only: '/^v[\d.]+$/'
+jobs:
+  node6:
+    docker:
+      - image: 'node:6'
+    steps: &unit_tests_steps
+      - checkout
+      - run:
+          name: Install and configure Cloud SDK
+          command: |
+            echo $KEYFILE > key.json
+            curl https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-sdk-209.0.0-linux-x86_64.tar.gz | tar xz
+            mv ./google-cloud-sdk /opt
+            export PATH=$PATH:/opt/google-cloud-sdk/bin
+            gcloud components install beta -q
+            gcloud components update -q
+            gcloud config set project cloud-functions-emulator
+            gcloud config set compute/region us-central1
+            gcloud auth activate-service-account --key-file key.json
+      - run: yarn
+      - run: yarn test
+      - run: node_modules/.bin/codecov
+  # node8:
+  #   docker:
+  #     - image: 'node:8'
+  #   steps: *unit_tests_steps
+  # node10:
+  #   docker:
+  #     - image: 'node:10'
+  #   steps: *unit_tests_steps
+  lint:
+    docker:
+      - image: 'node:6'
+    steps:
+      - checkout
+      - run: yarn install
+      - run: npm run lint
+  system_tests:
+    docker:
+      - image: 'node:6'
+        user: node
+    steps:
+      - checkout
+      - run: yarn
+      - run: yarn run system-test
+  publish_npm:
+    docker:
+      - image: 'node:10'
+    steps:
+      - checkout
+      - run: echo "//registry.npmjs.org/:_authToken=${NPM_TOKEN}" > ~/.npmrc
+      - run: npm publish
diff --git a/circle.yml b/circle.yml
deleted file mode 100644
index ac008ca..0000000
--- a/circle.yml
+++ /dev/null
@@ -1,47 +0,0 @@
-# Copyright 2017, Google, Inc.
-# Licensed under the Apache License, Version 2.0 (the "License")
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# See:
-#
-#  https://circleci.com/docs/configuration/
-#  https://circleci.com/docs/install-and-use-yarn/
-
-# Adjust the behavior of the virtual machine (VM)
-machine:
-  node:
-    version: 6.11.5
-
-# Use for broader build-related configuration
-general:
-  artifacts:
-    - "test/system/test-log.txt"
-  branches:
-    ignore:
-      - gh-pages
-
-# Install your project's language-specific dependencies
-dependencies:
-  pre:
-    - yarn global add nyc codecov
-  override:
-    - yarn
-  cache_directories:
-    - ~/.cache/yarn
-    - /opt/google-cloud-sdk
-
-# Run your tests
-test:
-  override:
-    - yarn test
-  post:
-    - nyc report --reporter=lcov > coverage.lcov && codecov
diff --git a/package.json b/package.json
index 7e4d87d..37a9b92 100644
--- a/package.json
+++ b/package.json
@@ -93,6 +93,7 @@
   },
   "devDependencies": {
     "@google-cloud/nodejs-repo-tools": "2.2.0",
+    "codecov": "^3.0.4",
     "intelli-espower-loader": "1.0.1",
     "mocha": "5.0.1",
     "nock": "9.1.6",