diff --git a/lua/opencode.lua b/lua/opencode.lua
index 67e9f1f..00ca0ae 100644
--- a/lua/opencode.lua
+++ b/lua/opencode.lua
@@ -7,7 +7,7 @@ local state = {
 }
 
 local config = {
-  width = 0.4,
+  width = 0.2,
 }
 
 local function is_valid_window(win)
@@ -22,15 +22,10 @@ local function terminal_width()
   return math.max(1, math.floor(vim.o.columns * config.width))
 end
 
-local function resize_side_window()
-  if is_valid_window(state.win) then
-    vim.api.nvim_win_set_width(state.win, terminal_width())
-  end
-end
-
 local function open_side_window()
   vim.cmd("botright vertical " .. terminal_width() .. "new")
   state.win = vim.api.nvim_get_current_win()
+  vim.api.nvim_set_option_value("winfixwidth", true, { win = state.win })
 end
 
 local function start_terminal()
@@ -75,17 +70,12 @@ function M.setup(opts)
     )
 
     config.width = opts.width
-    resize_side_window()
   end
 
   vim.api.nvim_create_user_command("OpenCodeToggle", function()
     M.toggle()
   end, { force = true })
 
-  vim.api.nvim_create_autocmd("VimResized", {
-    group = vim.api.nvim_create_augroup("opencode_terminal_width", { clear = true }),
-    callback = resize_side_window,
-  })
 end
 
 return M