diff --git a/composer.json b/composer.json
index c2600ed..6521aa6 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
     }
   , "require": {
         "php": ">=5.4.2"
-      , "ratchet/rfc6455": "^0.2"
+      , "ratchet/rfc6455": "^0.3"
       , "react/socket": "^1.0 || ^0.8 || ^0.7 || ^0.6 || ^0.5"
       , "guzzlehttp/psr7": "^1.0"
       , "symfony/http-foundation": "^2.6|^3.0|^4.0|^5.0"