diff --git a/composer.json b/composer.json
index 90f4b93..37b63a0 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,9 @@
     ],
     "require": {
         "php": ">=5.3.0",
-        "ext-curl": "*",
+        "ext-curl": "*"
+    },
+    "require-dev": {
         "phpunit/phpunit": "4.8.29"
     },
     "support": {