diff --git a/roles/custom/matrix-continuwuity/defaults/main.yml b/roles/custom/matrix-continuwuity/defaults/main.yml
index a9798f387..f956e84dd 100644
--- a/roles/custom/matrix-continuwuity/defaults/main.yml
+++ b/roles/custom/matrix-continuwuity/defaults/main.yml
@@ -200,8 +200,8 @@ matrix_continuwuity_config_allow_encryption: true
 matrix_continuwuity_config_allow_room_creation: true
 
 # Controls the default room version continuwuity will create rooms with.
-# Per spec, room version '11' is the default.
-matrix_continuwuity_config_default_room_version: '11'
+# Per spec, room version '12' is the default (According to spec release 1.18).
+matrix_continuwuity_config_default_room_version: '12'
 
 # List/vector of room IDs or room aliases that continuwuity will make
 # newly registered users join. The rooms specified must be rooms that you