diff --git a/roles/custom/matrix-synapse/defaults/main.yml b/roles/custom/matrix-synapse/defaults/main.yml
index 159fa0020..112091b08 100644
--- a/roles/custom/matrix-synapse/defaults/main.yml
+++ b/roles/custom/matrix-synapse/defaults/main.yml
@@ -1562,7 +1562,7 @@ matrix_synapse_room_list_publication_rules:
     room_id: "*"
     action: allow
 
-matrix_synapse_default_room_version: "10"
+matrix_synapse_default_room_version: "11"
 
 # Controls whether leaving a room will automatically forget it.
 # The upstream default is `false`, but we try to make Synapse less wasteful of resources, so we do things differently.