diff --git a/scripts-dev/convert_server_keys.py b/scripts-dev/convert_server_keys.py
index 024ddcdbd..a1ee39059 100644
--- a/scripts-dev/convert_server_keys.py
+++ b/scripts-dev/convert_server_keys.py
@@ -47,7 +47,10 @@ def convert_v1_to_v2(server_name, valid_until, keys, certificate):
     return {
         "old_verify_keys": {},
         "server_name": server_name,
-        "verify_keys": keys,
+        "verify_keys": {
+            key_id: {"key": key}
+            for key_id, key in keys.items()
+        },
         "valid_until_ts": valid_until,
         "tls_fingerprints": [fingerprint(certificate)],
     }
diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py
index 2e11ac062..fa4321141 100755
--- a/synapse/app/homeserver.py
+++ b/synapse/app/homeserver.py
@@ -85,10 +85,10 @@ class SynapseHomeServer(HomeServer):
         return MatrixFederationHttpClient(self)
 
     def build_resource_for_client(self):
-        return ClientV1RestResource(self)
+        return gz_wrap(ClientV1RestResource(self))
 
     def build_resource_for_client_v2_alpha(self):
-        return ClientV2AlphaRestResource(self)
+        return gz_wrap(ClientV2AlphaRestResource(self))
 
     def build_resource_for_federation(self):
         return JsonResource(self)
@@ -97,6 +97,12 @@ class SynapseHomeServer(HomeServer):
         import syweb
         syweb_path = os.path.dirname(syweb.__file__)
         webclient_path = os.path.join(syweb_path, "webclient")
+        # GZip is disabled here due to
+        # https://twistedmatrix.com/trac/ticket/7678
+        # (It can stay enabled for the API resources: they call
+        # write() with the whole body and then finish() straight
+        # after and so do not trigger the bug.
+        # return GzipFile(webclient_path)  # TODO configurable?
         return File(webclient_path)  # TODO configurable?
 
     def build_resource_for_static_content(self):