diff --git a/composer.json b/composer.json
index 1d6b33e5..837e7571 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
     "require-dev": {
         "ext-curl": "*",
         "laminas/laminas-coding-standard": "^3.0.1",
-        "phpunit/phpunit": "^10.5.38"
+        "phpunit/phpunit": "^13.0.0"
     },
     "suggest": {
         "paragonie/certainty": "For automated management of cacert.pem"