diff --git a/README.md b/README.md
index d6efad2..e03a8fd 100644
--- a/README.md
+++ b/README.md
@@ -92,7 +92,7 @@ which is supported by various containers out of the box.
 Woohoo Labs. Harmony's middleware interface design is based on the the
 [PSR-15](https://www.php-fig.org/psr/psr-15/) de-facto standard.
 
-If you want to learn about the specifics of this style, please refer to the following article which describe the
+If you want to learn about the specifics of this style, please refer to the following articles which describe the
 very concept:
 
 - [PSR-15 Meta Document](https://www.php-fig.org/psr/psr-15/meta/) 
diff --git a/composer.json b/composer.json
index edb3dba..5b21085 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
     },
     "require-dev": {
         "nikic/fast-route": "^1.0.0",
-        "phpunit/phpunit": "^6.0.0",
+        "phpunit/phpunit": "^7.0.0",
         "squizlabs/php_codesniffer": "^2.8.0",
         "zendframework/zend-diactoros": "^1.3.0"
     },