diff --git a/config/default.nix b/config/default.nix
index a583f4e..5b90c62 100644
--- a/config/default.nix
+++ b/config/default.nix
@@ -48,13 +48,25 @@
         enable = true;
         autoEnableSources = true;
         settings = {
-          sources = [
-            { name = "nvim_lsp"; }
-            { name = "path"; }
-            { name = "buffer"; }
-            { name = "luasnip"; }
-            { name = "cmdline"; }
-          ];
+            sources = [
+                { name = "nvim_lsp"; }
+                { name = "path"; }
+                { name = "buffer"; }
+                { name = "luasnip"; }
+                { name = "cmdline"; }
+            ];
+
+            mapping = {
+                "[ '<C-u>' ]" = "cmp.mapping.scroll_docs(-4)";
+                "[ '<C-d>' ]" = "cmp.mapping.scroll_docs(4)";
+#                """""""""""""""""""""""""""""""""""""""""""""""""""
+            };
+
+            snippet.expand = ''
+                function(args)
+                    require("luasnip").lsp_expand(args.body)
+                end
+            '';
         };
 
       };