diff --git a/composer.json b/composer.json
index 8f3e1718bf..ef27a85c65 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
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         "yoast/phpunit-polyfills": "2.0.0",
         "johnpbloch/wordpress-core": "6.4.1",
-        "wp-phpunit/wp-phpunit": "6.3.1",
+        "wp-phpunit/wp-phpunit": "6.4.1",
         "wp-cli/wp-cli": "2.9.0"
     },
     "config": {
diff --git a/composer.lock b/composer.lock
index 78063e87b2..304e2f4bd0 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": "07cae78f27ce1a1763a25e86e2fd0804",
+    "content-hash": "fcb388fad371b5e31ffc2f40fe302290",
     "packages": [],
     "packages-dev": [
         {
@@ -2953,16 +2953,16 @@
         },
         {
             "name": "wp-phpunit/wp-phpunit",
-            "version": "6.3.1",
+            "version": "6.4.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/wp-phpunit/wp-phpunit.git",
-                "reference": "4797791a311c41d213027333e4fcc48073f77df0"
+                "reference": "7b0f58b0c33ba2569a4de74761c10c629298e7ce"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/wp-phpunit/wp-phpunit/zipball/4797791a311c41d213027333e4fcc48073f77df0",
-                "reference": "4797791a311c41d213027333e4fcc48073f77df0",
+                "url": "https://api.github.com/repos/wp-phpunit/wp-phpunit/zipball/7b0f58b0c33ba2569a4de74761c10c629298e7ce",
+                "reference": "7b0f58b0c33ba2569a4de74761c10c629298e7ce",
                 "shasum": ""
             },
             "type": "library",
@@ -2997,7 +2997,7 @@
                 "issues": "https://github.com/wp-phpunit/issues",
                 "source": "https://github.com/wp-phpunit/wp-phpunit"
             },
-            "time": "2023-08-09T01:26:57+00:00"
+            "time": "2023-11-28T00:32:39+00:00"
         },
         {
             "name": "yoast/phpunit-polyfills",