diff --git a/composer.json b/composer.json
index 5712358..6d0a294 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
         "php": ">=7.4",
         "silverstripe/framework": "^4@dev",
         "silverstripe/cms": "^4@dev",
-        "onelogin/php-saml": "^4.1.0"
+        "onelogin/php-saml": "~4.0.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.5",