diff --git a/composer.json b/composer.json
index d5c5e4a044d..83dce1fda06 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
     "woocommerce/woocommerce-rest-api": "1.0.6"
   },
   "require-dev": {
-    "phpunit/phpunit": "7.5.18",
+    "phpunit/phpunit": "7.5.20",
     "woocommerce/woocommerce-sniffs": "0.0.9"
   },
   "config": {
diff --git a/composer.lock b/composer.lock
index 16ee08e844d..1af8da387da 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": "e8edf85437f4ee3362f0447d20314506",
+    "content-hash": "316f960abc40df62fbc75b77930323fc",
     "packages": [
         {
             "name": "automattic/jetpack-autoloader",
@@ -1213,16 +1213,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "7.5.18",
+            "version": "7.5.20",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "fcf6c4bfafaadc07785528b06385cce88935474d"
+                "reference": "9467db479d1b0487c99733bb1e7944d32deded2c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/fcf6c4bfafaadc07785528b06385cce88935474d",
-                "reference": "fcf6c4bfafaadc07785528b06385cce88935474d",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/9467db479d1b0487c99733bb1e7944d32deded2c",
+                "reference": "9467db479d1b0487c99733bb1e7944d32deded2c",
                 "shasum": ""
             },
             "require": {
@@ -1293,7 +1293,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2019-12-06T05:14:37+00:00"
+            "time": "2020-01-08T08:45:45+00:00"
         },
         {
             "name": "sebastian/code-unit-reverse-lookup",