diff --git a/lua/plugins/completions.lua b/lua/plugins/completions.lua
index 07fb287..d8f725e 100644
--- a/lua/plugins/completions.lua
+++ b/lua/plugins/completions.lua
@@ -254,5 +254,15 @@ return {
       toggle_key_flip_floatwin_setting = true,
       select_signature_key = '<C-l>',
     })
+
+    -- When harper-ls is installed
+    local mason_registry = require('mason-registry')
+    if mason_registry.is_installed('harper-ls') then
+      -- Disable builtin spell mode highlighting
+      vim.cmd.highlight('SpellBad',   'NONE')
+      vim.cmd.highlight('SpellCap',   'NONE')
+      vim.cmd.highlight('SpellLocal', 'NONE')
+      vim.cmd.highlight('SpellRare',  'NONE')
+    end
   end
 }