diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index b031078..0000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,66 +0,0 @@
-version: 2
-jobs:
-  build_deploy:
-    docker:
-      - image: circleci/node:latest
-
-    working_directory: ~/repo
-
-    steps:
-      - checkout
-
-      # Download and cache dependencies
-      - restore_cache:
-          keys:
-          - v1-dependencies-{{ checksum "package.json" }}
-          # fallback to using the latest cache if no exact match is found
-          - v1-dependencies-
-
-      - run: yarn install
-
-      - save_cache:
-          paths:
-            - node_modules
-          key: v1-dependencies-{{ checksum "package.json" }}
-
-      - run:
-          name: Run tests
-          command: yarn test
-
-      - store_artifacts:
-          path: reports
-
-      - store_test_results:
-          path: reports/test-results
-
-      - run:
-          name: Build site
-          command: yarn build
-
-      - store_artifacts:
-          path: build
-
-      - run:
-          name: Deploy to S3
-          command: yarn deploy
-
-workflows:
-  version: 2
-  preview:
-    jobs:
-      - build_deploy:
-          context: regexper-preview
-          filters:
-            tags:
-              ignore: /.*/
-            branches:
-              only: /.*/
-  prod:
-    jobs:
-      - build_deploy:
-          context: regexper-prod
-          filters:
-            tags:
-              only: /.*/
-            branches:
-              ignore: /.*/
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..46930e5
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,54 @@
+cache:
+  paths:
+    - node_modules
+
+before_script:
+  - yarn install
+
+stages:
+  - test
+  - build
+  - deploy
+
+test:
+  stage: test
+  coverage: '/^Statements\s*:\s*([^%]+)/'
+  artifacts:
+    paths:
+      - reports/
+  script:
+    yarn test
+
+build:
+  stage: build
+  artifacts:
+    paths:
+      - build/
+  script:
+    - yarn build
+
+deploy_preview:
+  stage: deploy
+  environment:
+    name: preview
+    url: https://preview.regexper.com
+  variables:
+    BANNER: preview
+    CLOUD_FRONT_ID: $PREVIEW_CLOUDFRONT_ID
+    DEPLOY_BUCKET: $PREVIEW_DEPLOY_BUCKET
+    DEPLOY_ENV: preview
+    GA_PROPERTY: $PREVIEW_GA_PROPERTY
+  script:
+    - yarn deploy
+  only:
+    - react # TODO: Change to master once merged
+
+deploy_production:
+  stage: deploy
+  environment:
+    name: production
+    url: https://regexper.com
+  script:
+    - yarn deploy
+  only:
+    - tags
diff --git a/README.md b/README.md
index c24fa5d..c415932 100644
--- a/README.md
+++ b/README.md
@@ -50,12 +50,12 @@ Several environment variables are used to configure the application at build-tim
 * `NODE_ENV` - Effects build-time optimizations. Set to `"production"` for builds and unit tests in package.json. Setting to anything else will show a banner in the application's header.
 * `GA_PROPERTY` - Google Analytics property ID.
 * `SENTRY_KEY` - Sentry.io DSN key for error reporting.
-* `CIRCLE_BRANCH`, `CIRCLE_BUILD_NUM`, and `CIRCLE_SHA1` - CircleCI values used to generate build ID. Displayed in application footer and used in Sentry.io error reports.
+* `CI_COMMIT_REF_SLUG`, `CI_COMMIT_SHA` - GitLab CI values used to generate build ID. Displayed in application footer and used in Sentry.io error reports.
 * `CLOUD_FRONT_ID` - AWS CloudFront distribution ID to invalidating when running `yarn deploy`
 * `DEPLOY_BUCKET` - AWS S3 bucket to deploy application to when running `yarn deploy`.
 * `DEPLOY_ENV` - Environment the application will be deployed to. Used to report environment in Sentry.io error reports. Typically set to either "preview" or "production".
 * `BANNER` - Text to display in header banner. Generally generated from `NODE_ENV`
-* `BUILD_ID` - Application build ID. Generated from `CIRCLE_BRANCH`, `CIRCLE_BUILD_NUM`, and `CIRCLE_SHA1` if not set.
+* `BUILD_ID` - Application build ID. Generated from `CI_COMMIT_REF_SLUG` and `CI_COMMIT_SHA` if not set.
 
 ## License
 
diff --git a/webpack.common.js b/webpack.common.js
index e663909..34b642b 100644
--- a/webpack.common.js
+++ b/webpack.common.js
@@ -8,9 +8,8 @@ const HtmlPlugin = require('html-webpack-plugin');
 
 const pkg = require('./package.json');
 const buildId = [
-  process.env.CIRCLE_BRANCH || 'prerelease',
-  process.env.CIRCLE_BUILD_NUM || '##',
-  (process.env.CIRCLE_SHA1 || 'gitsha').slice(0, 7)
+  process.env.CI_COMMIT_REF_SLUG || 'prerelease',
+  (process.env.CI_COMMIT_SHA || 'gitsha').slice(0, 7)
 ].join('-');
 
 const pages = fs.readdirSync(path.resolve(__dirname, 'src/pages'));