diff --git a/composer.json b/composer.json
index da79b81..8fa7c63 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     "require": {
         "php": ">=5.5",
         "symfony/process": "^2.5",
-        "jms/serializer": "^1.0",
+        "jms/serializer": "2.0.0-RC1",
         "phpoption/phpoption": "^1.3",
         "symfony/filesystem": "^2.3",
         "nesbot/carbon": "^1.14",