diff --git a/composer.json b/composer.json
index fe3c11f..f14557a 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
         "silverstripe/versioned": "^1.4@dev"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.7",
+        "sminnee/phpunit": "^5.7",
         "squizlabs/php_codesniffer": "^3.0"
     },
     "autoload": {