diff --git a/.travis.yml b/.travis.yml
index 645db19..10c1693 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,7 @@ php:
   - 5.6
   - 7.0
   - 7.1
+  - 7.2
 
 env:
   - DEPS=normal
@@ -15,6 +16,11 @@ env:
 
 matrix:
   fast_finish: true
+  exclude:
+    - php: 7.2
+      env: DEPS=normal
+    - php: 7.2
+      env: DEPS=lowest
 
 branches:
   only:
diff --git a/composer.json b/composer.json
index 146c1f0..031ca96 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         "tijsverkoyen/css-to-inline-styles": "^2.1"
     },
     "require-dev" : {
-        "phpunit/phpunit": "^4.0|^5.0",
+        "phpunit/phpunit": "^4 || ^5 || ^6",
         "symfony/css-selector": "^2.0.5|^3.0"
     },
     "autoload": {
diff --git a/composer.lock b/composer.lock
index a329287..c3ef811 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "a9334c747e0408639caa8a44ac087bd9",
+    "content-hash": "b9451eb2d8f3df00e862819807e389de",
     "packages": [
         {
             "name": "swiftmailer/swiftmailer",