diff --git a/lua/config/options.lua b/lua/config/options.lua
index 2b019c6..f85c89d 100644
--- a/lua/config/options.lua
+++ b/lua/config/options.lua
@@ -75,3 +75,6 @@ opt.foldlevel = 20
 opt.foldmethod = 'expr'
 opt.foldexpr = 'nvim_treesitter#foldexpr()'
 opt.foldexpr = 'nvim_treesitter#foldexpr()'
+
+-- Window border for floating windows
+require('lspconfig.ui.windows').default_options.border = 'rounded'
diff --git a/lua/plugins/lspconfig.lua b/lua/plugins/lspconfig.lua
index fc6b0c3..28d376f 100644
--- a/lua/plugins/lspconfig.lua
+++ b/lua/plugins/lspconfig.lua
@@ -12,7 +12,11 @@ return {
     },
   },
   config = function()
-    require('mason').setup()
+    require('mason').setup({
+      ui = {
+        border = 'rounded'
+      }
+    })
     require('mason-lspconfig').setup({
       automatic_installation = false,
     })