diff --git a/composer.json b/composer.json
index 44c79c6..fee3078 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
     }
   , "require": {
         "php": ">=8.4.0"
-      , "mfmdevsystem/rfc6455": "*"
+      , "mfmdevsystem/rfc6455": "dev-master"
       , "react/socket": "^1.0 || ^0.8 || ^0.7 || ^0.6 || ^0.5"
       , "react/event-loop": ">=0.4"
       , "guzzlehttp/psr7": "^1.7|^2.0"