diff --git a/composer.json b/composer.json
index 4856aa5..8a1d04c 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
         "phpdocumentor/reflection-docblock": "^3.0",
         "sabre/event": "^5.0",
         "felixfbecker/advanced-json-rpc": "^2.0",
-        "squizlabs/php_codesniffer" : "^3.0",
+        "squizlabs/php_codesniffer" : "3.0.0RC3",
         "netresearch/jsonmapper": "^1.0",
         "webmozart/path-util": "^2.3",
         "webmozart/glob": "^4.1",