1 files changed, 3 insertions, 1 deletions
diff --git a/synapse/rest/client/account.py b/synapse/rest/client/account.py
index e74a87af4d..641390cb30 100644
--- a/synapse/rest/client/account.py
+++ b/synapse/rest/client/account.py
@@ -24,6 +24,8 @@ if TYPE_CHECKING or HAS_PYDANTIC_V2:
     from pydantic.v1 import StrictBool, StrictStr, constr
 else:
     from pydantic import StrictBool, StrictStr, constr
+
+import attr
 from typing_extensions import Literal
 
 from twisted.web.server import Request
@@ -595,7 +597,7 @@ class ThreepidRestServlet(RestServlet):
 
         threepids = await self.datastore.user_get_threepids(requester.user.to_string())
 
-        return 200, {"threepids": threepids}
+        return 200, {"threepids": [attr.asdict(t) for t in threepids]}
 
     # NOTE(dmr): I have chosen not to use Pydantic to parse this request's body, because
     # the endpoint is deprecated. (If you really want to, you could do this by reusing