diff --git a/composer.json b/composer.json
index ead4c53..4828efa 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
     "require": {
         "php": "^8.3",
         "silverstripe/framework": "^6",
-        "onelogin/php-saml": "^4"
+        "onelogin/php-saml": "^4.2"
     },
     "require-dev": {
         "phpunit/phpunit": "^11.3",