diff --git a/files/.config/dunst/dunstrc b/files/.config/dunst/dunstrc
index edf86ae..9903739 100644
--- a/files/.config/dunst/dunstrc
+++ b/files/.config/dunst/dunstrc
@@ -202,7 +202,7 @@
     # corners.
     # The radius will be automatically lowered if it exceeds half of the
     # notification height to avoid clipping text and/or icons.
-    corner_radius = 15
+    corner_radius = 0
 
     ### Legacy
 
diff --git a/files/init.el b/files/init.el
index 1612832..f3268e9 100644
--- a/files/init.el
+++ b/files/init.el
@@ -267,7 +267,67 @@
     "gb" 'magit-branch))
 
 ;; Treemacs
-(use-package treey
+(use-package treemacs
+  :ensure t
+  :defer t
+  :config
+  (progn
+    (setq
+     treemacs-follow-after-init t
+     treemacs-persist-file (expand-file-name ".cache/treemacs-persist" user-emacs-directory)
+     treemacs-width 40)
+    (treemacs-follow-mode t))
+  :bind
+  (:map global-map
+    ("C-x t t" . treemacs)))
+
+;; C-c C-p -> projectile
+;; C-c C-w -> workspace
+
+(use-package treemacs-evil
+  :after (treemacs evil)
+  :ensure t)
+
+(use-package treemacs-projectile
+  :after (treemacs projectile)
+  :ensure t)
+
+;; Lsp
+(use-package lsp-mode
+  :ensure t
+  :commands (lsp lsp-deferred)
+  :init
+  (setq lsp-keymap-prefix "C-l")
+  (setq gc-cons-threshold 100000000) ;; 100 mb
+  (setq read-process-output-max (* 1024 1024)) ;; 1mb
+  :config
+  (lsp-enable-which-key-integration t)
+  (setq lsp-rust-server 'rust-analyzer)
+  (setq lsp-auto-guess-root t)
+  (setq lsp-idle-delay 1.)
+  :hook
+  (rust-mode . lsp)
+  (java-mode . lsp)
+  (python-mode . lsp)
+  (haskell-mode . lsp))
+
+;; ui integration for lsp
+(use-package lsp-ui
+  :ensure t
+  :config
+  (setq lsp-ui-peek-enable nil)
+  (setq lsp-ui-sideline-show-code-actions nil)
+  (setq lsp-modeline-code-actions-enable nil)
+  (setq lsp-ui-doc-enable nil))
+
+;; tags
+(use-package lsp-ivy
+  :ensure t
+  :after lsp-mode
+  :bind(:map lsp-mode-map ("C-l g a" . lsp-ivy-workspace-symbol)))
+
+;; completion for lsp
+(use-package company
   :ensure t
   :hook
   (lsp-mode . company-mode)
@@ -276,7 +336,7 @@
   (org-mode . company-mode)
   :custom
   (company-minimum-prefix-length 2)
-  (company-idle-delay 0.4)
+  (company-idle-delay 0.1)
   :bind (:map company-active-map
 	      ("C-j" . company-select-next-or-abort) ;; down
 	      ("C-k" . company-select-previous-or-abort) ;; up