diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ac2a97b..e77d4374 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [4.23.1] - 2024-05-12
+
+### Fixed
+
+- UI/Config: Don't override Neovim defaults in default `float_win_config`.
+
 ## [4.23.0] - 2024-05-11
 
 ### Added
diff --git a/doc/rustaceanvim.txt b/doc/rustaceanvim.txt
index 64436e3a..9da43f53 100644
--- a/doc/rustaceanvim.txt
+++ b/doc/rustaceanvim.txt
@@ -171,10 +171,12 @@ RustaceanExecutorOpts                                    *RustaceanExecutorOpts*
 FloatWinConfig                                                  *FloatWinConfig*
 
     Fields: ~
-        {open_split}  ("horizontal"|"vertical")
+        {auto_focus?}  (boolean)
+        {open_split?}  ("horizontal"|"vertical")
 
     See: ~
         |vim.lsp.util.open_floating_preview.Opts|
+        |vim.api.nvim_open_win|
 
 
 executor_alias                                                  *executor_alias*
diff --git a/lua/rustaceanvim/config/check.lua b/lua/rustaceanvim/config/check.lua
index 6ba776ed..41910d83 100644
--- a/lua/rustaceanvim/config/check.lua
+++ b/lua/rustaceanvim/config/check.lua
@@ -57,9 +57,6 @@ function M.validate(cfg)
   end
   local float_win_config = tools.float_win_config
   ok, err = validate('tools.float_win_config', {
-    border = { float_win_config.border, { 'table', 'string' } },
-    max_height = { float_win_config.max_height, 'number', true },
-    max_width = { float_win_config.max_width, 'number', true },
     auto_focus = { float_win_config.auto_focus, 'boolean' },
     open_split = { float_win_config.open_split, 'string' },
   })
diff --git a/lua/rustaceanvim/config/init.lua b/lua/rustaceanvim/config/init.lua
index 3c0a6c3b..124a404a 100644
--- a/lua/rustaceanvim/config/init.lua
+++ b/lua/rustaceanvim/config/init.lua
@@ -77,8 +77,10 @@ vim.g.rustaceanvim = vim.g.rustaceanvim
 ---@field bufnr? integer The buffer from which the executor was invoked.
 
 ---@class FloatWinConfig
----@field open_split 'horizontal' | 'vertical'
+---@field auto_focus? boolean
+---@field open_split? 'horizontal' | 'vertical'
 ---@see vim.lsp.util.open_floating_preview.Opts
+---@see vim.api.nvim_open_win
 
 ---@alias executor_alias 'termopen' | 'quickfix' | 'toggleterm' | 'vimux' | 'neotest'
 
diff --git a/lua/rustaceanvim/config/internal.lua b/lua/rustaceanvim/config/internal.lua
index 3e132590..6f9cf45a 100644
--- a/lua/rustaceanvim/config/internal.lua
+++ b/lua/rustaceanvim/config/internal.lua
@@ -139,31 +139,9 @@ local RustaceanDefaultConfig = {
 
     --- options same as lsp hover
     ---@see vim.lsp.util.open_floating_preview
+    ---@see vim.api.nvim_open_win
     ---@type table Options applied to floating windows.
     float_win_config = {
-
-      -- the border that is used for floating windows
-      ---@see vim.api.nvim_open_win()
-      ---@type string[][] | string
-      border = {
-        { '╭', 'FloatBorder' },
-        { '─', 'FloatBorder' },
-        { '╮', 'FloatBorder' },
-        { '│', 'FloatBorder' },
-        { '╯', 'FloatBorder' },
-        { '─', 'FloatBorder' },
-        { '╰', 'FloatBorder' },
-        { '│', 'FloatBorder' },
-      }, -- maybe: 'double', 'rounded', 'shadow', 'single',
-
-      --- maximal width of floating windows. Nil means no max.
-      ---@type integer | nil
-      max_width = nil,
-
-      --- maximal height of floating windows. Nil means no max.
-      ---@type integer | nil
-      max_height = nil,
-
       --- whether the window gets automatically focused
       --- default: false
       ---@type boolean