diff --git a/config/init.org b/config/init.org
index 0a65d1c..c7fdf08 100644
--- a/config/init.org
+++ b/config/init.org
@@ -196,6 +196,7 @@
 	    elisp
 	    go
 	    go-mod
+	    haskell
 	    java
 	    js
 	    json
@@ -235,6 +236,14 @@
 
 #+begin_src emacs-lisp
   (add-hook 'prog-mode-hook 'eglot-ensure)
+  (use-package haskell-mode :ensure t
+   :hook (haskell-mode . eglot-ensure))
+
+  (setq-default eglot-workspace-configuration
+                '((haskell
+                   (plugin
+                    (stan
+                     (globalOn . :json-false))))))  ;; disable stan
 
   (defun my/eglot-format-buffer-on-save ()
     "Format the current buffer if Eglot is active."
@@ -401,10 +410,10 @@
     (defvar my/tab-left (powerline-wave-right 'tab-line nil my/tab-height))
     (defvar my/tab-right (powerline-wave-left nil 'tab-line my/tab-height))
 
-    (defun my/tab-line-tab-name-buffer (buffer &optional _buffers)
-      (powerline-render (list my/tab-left
-			      (format "%s" (buffer-name buffer))
-			      my/tab-right)))
+  (defun my/tab-line-tab-name-buffer (buffer &optional _buffers)
+    (powerline-render (list my/tab-left
+          (format "%s" (buffer-name buffer))
+          my/tab-right)))
 
     (setq tab-line-tab-name-function #'my/tab-line-tab-name-buffer)