diff --git a/src/idpyoidc/message/oidc/__init__.py b/src/idpyoidc/message/oidc/__init__.py
index a1c9949f..7ac39c11 100644
--- a/src/idpyoidc/message/oidc/__init__.py
+++ b/src/idpyoidc/message/oidc/__init__.py
@@ -942,8 +942,11 @@ def verify(self, **kwargs):
                 "token_endpoint_auth_signing_alg_values_supported"
             )
 
-        if "RS256" not in self["id_token_signing_alg_values_supported"]:
-            raise ValueError("RS256 missing from id_token_signing_alg_values_supported")
+        # Check that any alg that is not "none" is supported.
+        # While OpenID Connect Core 1.0 says RS256 MUST be supported,
+        # reality has moved on and more modern alg values may be required.
+        if any(lower(i) != "none" for i in self["id_token_signing_alg_values_supported"]:
+            raise ValueError("Secure signing algorithm (for example RS256 or ES256) missing from id_token_signing_alg_values_supported")
 
         if not parts.query and not parts.fragment:
             pass