diff --git a/composer.json b/composer.json
index d397065da..fed89864e 100644
--- a/composer.json
+++ b/composer.json
@@ -31,7 +31,7 @@
         "psr/clock": "^1.0",
         "psr/http-message": "^2.0",
         "psr/log": "^2.0 || ^3.0",
-        "simplesamlphp/assert": "~1.4.0",
+        "simplesamlphp/assert": "~1.5.0",
         "simplesamlphp/xml-common": "~1.18.0",
         "simplesamlphp/xml-security": "~1.9.5",
         "simplesamlphp/xml-soap": "~1.5.3"