diff --git a/composer.json b/composer.json
index bbf9d4e..674fd2c 100644
--- a/composer.json
+++ b/composer.json
@@ -10,8 +10,8 @@
         "byjoby/flatrr": "dev-master"
     },
     "require-dev": {
-        "phpunit/phpunit": "^7",
-        "phpunit/dbunit": "^4.0"
+        "phpunit/phpunit": "^6.5",
+        "phpunit/dbunit": "^3"
     },
     "scripts": {
         "test": [