1 files changed, 5 insertions, 0 deletions
diff --git a/synapse/handlers/oidc.py b/synapse/handlers/oidc.py
index c9109c9e79..76b692928d 100644
--- a/synapse/handlers/oidc.py
+++ b/synapse/handlers/oidc.py
@@ -640,6 +640,11 @@ class OidcProvider:
         elif self._config.pkce_method == "never":
             metadata.pop("code_challenge_methods_supported", None)
 
+        if self._config.id_token_signing_alg_values_supported:
+            metadata["id_token_signing_alg_values_supported"] = (
+                self._config.id_token_signing_alg_values_supported
+            )
+
         self._validate_metadata(metadata)
 
         return metadata