diff --git a/composer.lock b/composer.lock
index ba4653c..d9ecdad 100644
--- a/composer.lock
+++ b/composer.lock
@@ -846,16 +846,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "6.4.1",
+            "version": "6.4.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "b770d8ba7e60295ee91d69d5a5e01ae833cac220"
+                "reference": "562f7dc75d46510a4ed5d16189ae57fbe45a9932"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/b770d8ba7e60295ee91d69d5a5e01ae833cac220",
-                "reference": "b770d8ba7e60295ee91d69d5a5e01ae833cac220",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/562f7dc75d46510a4ed5d16189ae57fbe45a9932",
+                "reference": "562f7dc75d46510a4ed5d16189ae57fbe45a9932",
                 "shasum": ""
             },
             "require": {
@@ -926,7 +926,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2017-10-07T17:53:53+00:00"
+            "time": "2017-11-08T11:26:09+00:00"
         },
         {
             "name": "phpunit/phpunit-mock-objects",