diff --git a/deployer/roles/build/templates/synapse/homeserver.yaml.j2 b/deployer/roles/build/templates/synapse/homeserver.yaml.j2
index 26a7730..53f01fb 100644
--- a/deployer/roles/build/templates/synapse/homeserver.yaml.j2
+++ b/deployer/roles/build/templates/synapse/homeserver.yaml.j2
@@ -930,7 +930,7 @@ turn_allow_guests: true
 
 # Enable registration for new users.
 #
-enable_registration: true
+enable_registration: false
 
 # Optional account validity configuration. This allows for accounts to be denied
 # any request after a given period.