diff --git a/.emacs.d/config/c.el b/.emacs.d/config/c.el
index 1373b7b..f013035 100644
--- a/.emacs.d/config/c.el
+++ b/.emacs.d/config/c.el
@@ -1,8 +1,3 @@
 ;; set c style to linux and indention to 2
 (setq c-default-style "linux"
       c-basic-offset 2)
-
-(use-package lsp-mode
-  :ensure t
-  :hook
-  (c-mode . lsp-deferred))
diff --git a/.emacs.d/config/dev.el b/.emacs.d/config/dev.el
index d6808c7..15f4b1f 100644
--- a/.emacs.d/config/dev.el
+++ b/.emacs.d/config/dev.el
@@ -40,9 +40,7 @@
 (add-hook 'prog-mode-hook #'flyspell-prog-mode)
 
 (use-package lsp-mode
-  :ensure t
-  :config
-  (setq lsp-completion-default-behaviour ':insert))
+  :ensure t)
 
 (use-package lsp-ui
   :ensure t
@@ -50,8 +48,7 @@
   ("C-c i" . lsp-ui-doc-show)
   :config
   (setq lsp-ui-doc-position 'at-point)
-  (setq lsp-ui-doc-show-with-mouse nil)
-  (setq lsp-ui-sideline-show-diagnostics nil))
+  (setq lsp-ui-doc-show-with-mouse nil))
 
 (use-package yasnippet
   :ensure t)