diff --git a/composer.json b/composer.json
index 59fc076..9122227 100644
--- a/composer.json
+++ b/composer.json
@@ -7,8 +7,9 @@
   },
   "require": {
     "smarty/smarty": "^3.1",
+    "carbondate/carbon": "^1.33",
     "phpmailer/phpmailer": "^6.1",
-    "php": ">=7.3",
+    "php": ">=7.1",
     "codeception/codeception": "^3.1"
   },
   "authors": [