diff --git a/.docheader b/.docheader
new file mode 100644
index 00000000..b1db7956
--- /dev/null
+++ b/.docheader
@@ -0,0 +1,8 @@
+/*
+ * This file is part of Respect/Validation.
+ *
+ * (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
+ *
+ * For the full copyright and license information, please view the "LICENSE.md"
+ * file that was distributed with this source code.
+ */
diff --git a/.travis.yml b/.travis.yml
index 56121324..40181e3d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,7 @@ before_script:
 
 script:
   - vendor/bin/phpunit --configuration phpunit.xml.dist --colors --coverage-clover=coverage.clover
+  - vendor/bin/docheader check library tests
 
 after_script:
   - test "5.6" == "${TRAVIS_PHP_VERSION}" && wget https://scrutinizer-ci.com/ocular.phar
diff --git a/composer.json b/composer.json
index 5a334c9a..14007116 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,8 @@
         "mikey179/vfsStream": "^1.5",
         "phpunit/phpunit": "~5.3",
         "symfony/validator": "~2.6.9",
-        "zendframework/zend-validator": "~2.3"
+        "zendframework/zend-validator": "~2.3",
+        "malukenho/docheader": "^0.1.4"
     },
     "suggest": {
         "ext-bcmath": "Arbitrary Precision Mathematics",