diff --git a/roles/custom/matrix-synapse/defaults/main.yml b/roles/custom/matrix-synapse/defaults/main.yml
index 691012384..465d51c2d 100644
--- a/roles/custom/matrix-synapse/defaults/main.yml
+++ b/roles/custom/matrix-synapse/defaults/main.yml
@@ -16,7 +16,7 @@ matrix_synapse_enabled: true
 matrix_synapse_github_org_and_repo: element-hq/synapse
 
 # renovate: datasource=docker depName=ghcr.io/element-hq/synapse
-matrix_synapse_version: v1.135.0
+matrix_synapse_version: v1.135.1
 
 matrix_synapse_username: ''
 matrix_synapse_uid: ''
@@ -1568,7 +1568,7 @@ matrix_synapse_room_list_publication_rules:
     room_id: "*"
     action: allow
 
-matrix_synapse_default_room_version: "11"
+matrix_synapse_default_room_version: "12"
 
 # 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.