diff --git a/composer.json b/composer.json
index 45e1390df..56c3d5dd0 100644
--- a/composer.json
+++ b/composer.json
@@ -53,7 +53,7 @@
         "ext-xml": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.7",
+        "sminnee/phpunit": "^5.7.29",
         "sminnee/phpunit-mock-objects": "^3.4.9",
         "silverstripe/versioned": "^1",
         "squizlabs/php_codesniffer": "^3.5"