diff --git a/lua/blink/cmp/lib/window/docs.lua b/lua/blink/cmp/lib/window/docs.lua
index 78b0497d..d36d608b 100644
--- a/lua/blink/cmp/lib/window/docs.lua
+++ b/lua/blink/cmp/lib/window/docs.lua
@@ -42,7 +42,9 @@ function docs.render_detail_and_documentation(opts)
   -- skip original separator in doc_lines, so we can highlight it later
   vim.list_extend(combined_lines, doc_lines, doc_already_has_separator and 2 or 1)
 
+  vim.api.nvim_set_option_value('modifiable', true, { buf = opts.bufnr })
   vim.api.nvim_buf_set_lines(opts.bufnr, 0, -1, true, combined_lines)
+  vim.api.nvim_set_option_value('modifiable', false, { buf = opts.bufnr })
   vim.api.nvim_set_option_value('modified', false, { buf = opts.bufnr })
 
   -- Highlight with treesitter
diff --git a/lua/blink/cmp/lib/window/init.lua b/lua/blink/cmp/lib/window/init.lua
index 75be2d62..0336b8cd 100644
--- a/lua/blink/cmp/lib/window/init.lua
+++ b/lua/blink/cmp/lib/window/init.lua
@@ -136,6 +136,7 @@ function win:open()
   vim.api.nvim_set_option_value('cursorline', false, { win = self.id })
   vim.api.nvim_set_option_value('scrolloff', self.config.scrolloff, { win = self.id })
   vim.api.nvim_set_option_value('filetype', self.config.filetype, { buf = self.buf })
+  vim.api.nvim_set_option_value('modifiable', false, { buf = self.buf })
 
   self.cursor_line:update(self.id)
   if self.scrollbar then self.scrollbar:update(self.id) end