diff --git a/.travis.yml b/.travis.yml
index 71f8b45..d7db3a5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,21 +1,29 @@
 language: php
 
-sudo: false
+dist: bionic
 
 cache:
-  directories:
-    - $HOME/.composer/cache
+    directories:
+        - $HOME/.composer/cache
 
-php:
-    - 5.4
-    - 5.5
-    - 5.6
-    - 7.0
-    - 7.1
-    - 7.2
-    - nightly
-
-matrix:
+jobs:
+    include:
+        - php: 5.3
+          dist: precise
+          env: COMPOSER_MEMORY_LIMIT=4G
+        - php: 5.4
+          dist: trusty
+        - php: 5.5
+          dist: trusty
+        - php: 5.6
+          dist: xenial
+        - php: 7.0
+          dist: xenial
+        - php: 7.1
+        - php: 7.2
+        - php: 7.3
+        - php: 7.4
+        - php: nightly
     allow_failures:
         - php: nightly
 
diff --git a/composer.json b/composer.json
index f6ee954..65d8395 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         "behat/behat":     "~3.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^4.8.36|^6.3"
+        "phpunit/phpunit": "^4.8.36|^6.3|^7.5.15"
     },
     "autoload": {
         "psr-4": { "Caciobanu\\Behat\\DeprecationExtension\\": "src/" }
diff --git a/src/ServiceContainer/DeprecationExtension.php b/src/ServiceContainer/DeprecationExtension.php
index bd6aa85..3f1a013 100644
--- a/src/ServiceContainer/DeprecationExtension.php
+++ b/src/ServiceContainer/DeprecationExtension.php
@@ -60,7 +60,7 @@ public function configure(ArrayNodeDefinition $builder)
         $builder
             ->children()
                 ->arrayNode('ignore')
-                    ->arrayPrototype()
+                    ->prototype('array')
                         ->children()
                             ->scalarNode('file')->end()
                             ->scalarNode('message')->end()