diff --git a/composer.json b/composer.json
index 23faf6a..8e59991 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         "ext-json": "*",
         "guzzlehttp/guzzle": "~6.3",
         "jms/serializer": "^0.12|^1.0|^2.0|^3.0",
-        "symfony/validator": "~2.8|~3.0|~4.0",
+        "symfony/validator": "~2.8|~3.0|~4.0|^5.0",
         "doctrine/cache": "~1.6",
         "psr/log": "~1.0"
     },