1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/groups/attestations.py b/synapse/groups/attestations.py
index 27b0c02655..dab13c243f 100644
--- a/synapse/groups/attestations.py
+++ b/synapse/groups/attestations.py
@@ -70,7 +70,7 @@ class GroupAttestationSigning(object):
         self.keyring = hs.get_keyring()
         self.clock = hs.get_clock()
         self.server_name = hs.hostname
-        self.signing_key = hs.config.signing_key[0]
+        self.signing_key = hs.signing_key
 
     @defer.inlineCallbacks
     def verify_attestation(self, attestation, group_id, user_id, server_name=None):