diff --git a/clusters/cl01tl/helm/matrix-synapse/values.yaml b/clusters/cl01tl/helm/matrix-synapse/values.yaml
index d7689fda8..83f8b3f69 100644
--- a/clusters/cl01tl/helm/matrix-synapse/values.yaml
+++ b/clusters/cl01tl/helm/matrix-synapse/values.yaml
@@ -469,7 +469,7 @@ redis-replication-hookshot:
   existingSecret:
     enabled: false
   redisReplication:
-    clusterSize: 1
+    clusterSize: 3
   redisSentinel:
     enabled: true
     clusterSize: 3