diff --git a/composer.json b/composer.json
index 73b1372..24e06a1 100644
--- a/composer.json
+++ b/composer.json
@@ -36,7 +36,7 @@
     "phpbench/phpbench": "^1.6.1",
     "phpstan/phpstan": "^2.1.46",
     "phpstan/phpstan-phpunit": "^2.0.16",
-    "phpunit/phpunit": "^11.5.55",
+    "phpunit/phpunit": "^13.0.0",
     "symfony/var-dumper": "^v7.4.8 || ^v8.0.0",
     "wnx/commonmark-markdown-renderer": "^1.6"
   },