diff --git a/lua/cosmic/plugins/cosmic-ui/init.lua b/lua/cosmic/plugins/cosmic-ui/init.lua
index e490e6f..25d4544 100644
--- a/lua/cosmic/plugins/cosmic-ui/init.lua
+++ b/lua/cosmic/plugins/cosmic-ui/init.lua
@@ -2,7 +2,7 @@ local config = require('cosmic.config')
 local utils = require('cosmic.utils')
 
 local defaults = {
-  border = 'rounded',
+  border_style = 'rounded',
 }
 
 require('cosmic-ui').setup(utils.merge(defaults, config.cosmic_ui or {}))