diff --git a/composer.json b/composer.json
index 3c7d92d..41fa062 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "nesbot/carbon": "1.*"
+        "nesbot/carbon": "~1.0"
     },
     "require-dev": {
         "phpunit/phpunit": "4.0.*"