diff --git a/composer.json b/composer.json
index fa0aed9..c79450d 100644
--- a/composer.json
+++ b/composer.json
@@ -10,6 +10,7 @@
         }
     ],
     "require": {
+        "nesbot/carbon": "^2.45"
     },
     "require-dev": {
       "phpunit/phpunit": "^8"