diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..471eb48
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,81 @@
+unit-config: &unit-config
+  environment:
+    COMPOSER_PREFER_LOWEST: 0
+  steps:
+    - checkout
+
+    - run:
+        name: Install latest composer
+        command: |
+          php -r "copy('https://raw.githubusercontent.com/composer/getcomposer.org/master/web/installer', 'composer-setup.php');"
+          php composer-setup.php
+          php -r "unlink('composer-setup.php');"
+          mv composer.phar /usr/local/bin/composer
+
+    - run:
+        name: Write COMPOSER_PREFER_LOWEST to file
+        command: echo "$COMPOSER_PREFER_LOWEST" > ~/COMPOSER_PREFER_LOWEST.txt
+
+    # Download and cache dependencies
+    - restore_cache:
+        keys:
+        - v1-composer-cache-{{ checksum "~/COMPOSER_PREFER_LOWEST.txt" }}-{{ checksum "composer.json" }}
+        # Fall back to using the latest cache if no exact match is found.
+        - v1-composer-cache-{{ checksum "~/COMPOSER_PREFER_LOWEST.txt" }}
+
+    - run:
+        name: Validate composer files
+        command: composer validate --strict
+
+    - run:
+        name: Install PHP extensions
+        command: |
+            printf '\n' | sudo pecl install redis
+            sudo docker-php-ext-enable redis
+
+    - run:
+        name: Install composer packages
+        command: |
+          if [ $COMPOSER_PREFER_LOWEST -eq "1" ]; then
+            composer update --no-ansi --no-progress --optimize-autoloader --no-interaction --no-plugins --no-scripts --prefer-dist --prefer-stable --prefer-lowest
+          else
+            composer update --no-ansi --no-progress --optimize-autoloader --no-interaction --no-plugins --no-scripts --prefer-dist --prefer-stable
+          fi
+
+    - save_cache:
+        key: v1-composer-cache-{{ checksum "~/COMPOSER_PREFER_LOWEST.txt" }}-{{ checksum "composer.json" }}
+        paths:
+          - ./vendor
+
+    - run:
+        name: Wait for backing services to start
+        command: dockerize -wait tcp://127.0.0.1:6379 -timeout 30s
+
+    - run:
+        name: Run tests
+        command: ./vendor/bin/phpunit
+
+version: 2.1
+jobs:
+  php73:
+    <<: *unit-config
+    docker:
+      - image: circleci/php:7.3-cli-node
+      - image: circleci/redis:5-alpine
+    environment:
+      COMPOSER_PREFER_LOWEST: 0
+
+  php73-lowest:
+    <<: *unit-config
+    docker:
+      - image: circleci/php:7.3-cli-node
+      - image: circleci/redis:5-alpine
+    environment:
+      COMPOSER_PREFER_LOWEST: 1
+
+workflows:
+  version: 2
+  units:
+    jobs:
+      - php73
+      - php73-lowest
diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..1044039
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,12 @@
+* text=auto
+/.circleci/         export-ignore
+/.github/           export-ignore
+/examples/          export-ignore
+/nginx/             export-ignore
+/php-fpm/           export-ignore
+/tests/             export-ignore
+.gitattributes      export-ignore
+.gitignore          export-ignore
+docker-compose.yml  export-ignore
+phpcs.xml.dist      export-ignore
+phpunit.xml.dist    export-ignore
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index cd51f3b..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,19 +0,0 @@
-language: php
-php: 
-  - 7.3
-  - 7.4
-
-services:
-  - redis-server
-
-before_script:
-  - echo "apc.enabled = 1" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
-  - echo "apc.enable_cli = 1" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
-  - echo "extension = apcu.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
-  - echo "extension = redis.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
-  - composer self-update
-  - composer install --no-interaction --prefer-source --dev
-  - phpenv rehash
-
-script:
-  - vendor/bin/phpunit --verbose --colors
diff --git a/composer.json b/composer.json
index fcfb614..c985b44 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,8 @@
 {
     "name": "endclothing/prometheus_client_php",
-    "version": "1.0.1",
+    "description": "Prometheus instrumentation library for PHP applications.",
+    "type": "library",
+    "license": "Apache-2.0",
     "authors": [
         {
             "name": "Daniel Noel-Davies",
@@ -33,5 +35,13 @@
             "Test\\Prometheus\\": "tests/"
         }
     },
-    "license": "Apache-2.0"
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.0-dev"
+        }
+    },
+    "config": {
+        "sort-packages": true
+    },
+    "prefer-stable": true
 }
diff --git a/phpunit.xml b/phpunit.xml.dist
similarity index 51%
rename from phpunit.xml
rename to phpunit.xml.dist
index ab027cb..9fc8a72 100644
--- a/phpunit.xml
+++ b/phpunit.xml.dist
@@ -7,15 +7,18 @@
          convertNoticesToExceptions="true"
          convertWarningsToExceptions="true"
          processIsolation="false"
+         stopOnError="false"
          stopOnFailure="false">
-<testsuites>
-    <testsuite name="Unit">
-        <directory>./tests/Test/Prometheus</directory>
-    </testsuite>
-</testsuites>
-<filter>
-    <whitelist processUncoveredFilesFromWhitelist="true">
-        <directory suffix=".php">./src/Prometheus</directory>
-    </whitelist>
-</filter>
+
+    <testsuites>
+        <testsuite name="Unit">
+            <directory>./tests/Test/Prometheus</directory>
+        </testsuite>
+    </testsuites>
+
+    <filter>
+        <whitelist processUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">./src/Prometheus</directory>
+        </whitelist>
+    </filter>
 </phpunit>