diff --git a/composer.json b/composer.json
index 5205e33..682b22e 100644
--- a/composer.json
+++ b/composer.json
@@ -38,6 +38,7 @@
 
         "simplesamlphp/assert": "^1.1",
         "simplesamlphp/saml11": "^1.0",
+        "simplesamlphp/saml2": "^5@dev",
         "simplesamlphp/simplesamlphp": "^2.3",
         "simplesamlphp/xml-common": "^1.16",
         "simplesamlphp/ws-security": "^1.0",