diff --git a/lua/avante/utils/init.lua b/lua/avante/utils/init.lua
index 22e456c..14626ee 100644
--- a/lua/avante/utils/init.lua
+++ b/lua/avante/utils/init.lua
@@ -405,6 +405,7 @@ function M.unlock_buf(bufnr)
 end
 
 function M.lock_buf(bufnr)
+  vim.cmd("stopinsert")
   vim.bo[bufnr].modified = false
   vim.bo[bufnr].modifiable = false
 end