diff --git a/composer.json b/composer.json
index e06a86e..c05a471 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
         "ext-intl": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "7.5.1"
+        "phpunit/phpunit": "7.5.4"
     },
     "autoload": {
         "psr-4": {