diff --git a/lua/neo-tree/sources/zk/init.lua b/lua/neo-tree/sources/zk/init.lua
index 5ba4064..79643cf 100644
--- a/lua/neo-tree/sources/zk/init.lua
+++ b/lua/neo-tree/sources/zk/init.lua
@@ -122,7 +122,7 @@ M.setup = function(config, global_config)
 	if global_config.enable_modified_markers then
 		manager.subscribe(M.name, {
 			event = events.VIM_BUFFER_MODIFIED_SET,
-			handler = wrap(manager.modified_buffers_changed),
+			handler = wrap(manager.opened_buffers_changed),
 		})
 	end