diff --git a/composer.json b/composer.json
index e01175d..591de77 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
     },
     "require": {
         "php": ">=7.0.19",
-        "beberlei/assert": "2.9.*",
+        "beberlei/assert": "^3.3",
         "doctrine/orm": "^2.5",
         "graze/guzzle-jsonrpc": "3.2.*",
         "guzzlehttp/guzzle": "^6.3",