diff --git a/groups b/groups
index b891d1b..4fc6f03 100644
--- a/groups
+++ b/groups
@@ -1,6 +1,7 @@
 # UUID                                                        	Group Name
 #
 66326fee1502be50f366279038a41476658a69c1                      	Administrators
+8fba5c67cef14f54732887f0ed5275874f63b0c1                      	Nobody
 f7db30a3f0ff326e3c86b9c76703f7a29d69e51c                      	Googlers
 global:Anonymous-Users                                        	Anonymous Users
 global:Project-Owners                                         	Project Owners
diff --git a/project.config b/project.config
index c3ce161..d30c0de 100644
--- a/project.config
+++ b/project.config
@@ -12,6 +12,8 @@
 [access "refs/*"]
 	read = group Administrators
 	read = group Googlers
+	exclusiveGroupPermissions = editTopicName
+	editTopicName = group Nobody
 [access "refs/for/*"]
 	addPatchSet = group Registered Users
 [access "refs/for/refs/*"]