diff --git a/composer.json b/composer.json
index 66c1ea541..67a877180 100644
--- a/composer.json
+++ b/composer.json
@@ -70,7 +70,7 @@
     "roave/security-advisories": "dev-latest",
     "newfold-labs/wp-php-standards": "^1.2.3",
     "wp-cli/i18n-command": "^2.6.1",
-    "wp-phpunit/wp-phpunit": "^6.5.3"
+    "wp-phpunit/wp-phpunit": "^6.5.4"
   },
   "require": {
     "newfold-labs/wp-module-activation": "^1.0.2",
diff --git a/composer.lock b/composer.lock
index 12117d276..3b5fa8141 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "99b7c1ad2aec59177f25bdd742adaa23",
+    "content-hash": "f551bf74dd2e6a4bb35402b7c8dd56d7",
     "packages": [
         {
             "name": "doctrine/inflector",
@@ -4143,7 +4143,7 @@
         },
         {
             "name": "wp-phpunit/wp-phpunit",
-            "version": "6.5.3",
+            "version": "6.5.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/wp-phpunit/wp-phpunit.git",