diff --git a/lua/cmp/utils/window.lua b/lua/cmp/utils/window.lua
index 1384150..bab230f 100644
--- a/lua/cmp/utils/window.lua
+++ b/lua/cmp/utils/window.lua
@@ -145,6 +145,7 @@ window.update = function(self)
         row = info.row,
         col = info.col + info.width - info.scrollbar_offset, -- info.col was already contained the scrollbar offset.
         zindex = (self.style.zindex and (self.style.zindex + 1) or 1),
+        border = "none",
       }
       if self.sbar_win and vim.api.nvim_win_is_valid(self.sbar_win) then
         vim.api.nvim_win_set_config(self.sbar_win, style)
@@ -176,6 +177,7 @@ window.update = function(self)
       row = info.row + thumb_offset + (info.border_info.visible and info.border_info.top or 0),
       col = info.col + info.width - 1, -- info.col was already added scrollbar offset.
       zindex = (self.style.zindex and (self.style.zindex + 2) or 2),
+      border = "none",
     }
     if self.thumb_win and vim.api.nvim_win_is_valid(self.thumb_win) then
       vim.api.nvim_win_set_config(self.thumb_win, style)