diff --git a/.travis.yml b/.travis.yml
index 832ccdd79..5459f5d2b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,12 +24,24 @@ jobs:
   include:
     - php: 7.2
       env: COVERAGE=1
+    - name: "PHP CS Fixer"
+      php: 7.0
+      install:
+        - composer global require friendsofphp/php-cs-fixer:^2.16
+      script:
+        # https://stackoverflow.com/questions/30664220/where-to-find-composers-global-packages/64545124#64545124
+        - PATH=$(composer global config bin-dir --absolute --quiet):$PATH
+        - php-cs-fixer fix --verbose --diff --dry-run --ansi
 
 services:
   - mongodb
   - mysql
   - postgresql
 
+cache:
+  directories:
+    - $HOME/.composer/cache
+
 install:
   - .travis/install.sh
 
diff --git a/composer.json b/composer.json
index b7cdf99a5..b50c4e180 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
     },
     "config": {
         "platform": {
-            "php": "7.0.0",
+            "php": "7.0.8",
             "ext-mongodb": "1.3.0"
         },
         "sort-packages": true
diff --git a/composer.lock b/composer.lock
index 2bd002010..ff3f38bc0 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "a5ff8076c131ae96fee3c6b23eaadcc2",
+    "content-hash": "85d3c2536a059671db43cee714e5ff3c",
     "packages": [
         {
             "name": "alcaeus/mongo-php-adapter",
@@ -1985,7 +1985,7 @@
     },
     "platform-dev": [],
     "platform-overrides": {
-        "php": "7.0.0",
+        "php": "7.0.8",
         "ext-mongodb": "1.3.0"
     },
     "plugin-api-version": "1.1.0"