diff --git a/lua/code-completion.lua b/lua/code-completion.lua
index dc08bac..b3564b9 100644
--- a/lua/code-completion.lua
+++ b/lua/code-completion.lua
@@ -21,6 +21,11 @@ cmp.setup({
 		documentation = cmp.config.window.bordered(),
 	},
 
+	-- experimental settings
+	experimental = {
+		ghost_text = {},
+	},
+
 	-- mapping
 	mapping = cmp.mapping.preset.insert({
 		-- Shift+TAB to go to the Previous Suggested item
@@ -45,15 +50,15 @@ cmp.setup({
 
 	-- installed sources for code suggestion
 	sources = cmp.config.sources({
-		{ name = "ultisnips", keyword_length = 1 },
+		{ name = "ultisnips", keyword_length = 3 },
 		{ name = "path" },
-		{ name = "nvim_lsp", keyword_length = 1 },
+		{ name = "nvim_lsp", keyword_length = 2 },
 		{ name = "nvim_lsp_signature_help" },
 		{ name = "nvim_lua", keyword_length = 2 },
 		{ name = "buffer", keyword_length = 1 },
 		{ name = "calc" },
 		{ name = "lua-latex-symbols", option = { cache = true } },
-		{ name = "cmp_tabnine", keyword_length = 2 },
+		{ name = "cmp_tabnine", keyword_length = 6 },
 	}),
 
 	-- add formatting of the different sources