diff --git a/lua/lualine/config.lua b/lua/lualine/config.lua
index 5e1fafe..53a1a11 100644
--- a/lua/lualine/config.lua
+++ b/lua/lualine/config.lua
@@ -41,27 +41,21 @@ local function fix_separators(separators)
 end
 
 local function apply_configuration(config_table)
+  if not config_table then return vim.deepcopy(config) end
   local function parse_sections(section_group_name)
     if not config_table[section_group_name] then return end
     for section_name, section in pairs(config_table[section_group_name]) do
       config[section_group_name][section_name] =
           vim.deepcopy(config_table[section_group_name][section_name])
-      if type(section) == 'table' then
-        for _, component in pairs(config[section_group_name][section_name]) do
-          if type(component) == 'table' and type(component[2]) == 'table' then
-            local options = component[2]
-            component[2] = nil
-            for key, val in pairs(options) do component[key] = val end
-          end
-        end
-      end
     end
   end
   parse_sections('options')
   parse_sections('sections')
   parse_sections('inactive_sections')
   parse_sections('tabline')
-  if config_table.extensions then config.extensions = config_table.extensions end
+  if config_table.extensions then
+    config.extensions = vim.deepcopy(config_table.extensions)
+  end
   config.options.section_separators = fix_separators(
                                           config.options.section_separators)
   config.options.component_separators = fix_separators(
diff --git a/lua/lualine/init.lua b/lua/lualine/init.lua
index 773482c..f56f9a6 100644
--- a/lua/lualine/init.lua
+++ b/lua/lualine/init.lua
@@ -218,17 +218,7 @@ local function setup_augroup()
 end
 
 local function setup(user_config)
-  if user_config then
-    config = config_module.apply_configuration(user_config)
-  elseif vim.g.lualine then
-    vim.schedule(function()
-      vim.api.nvim_err_writeln(
-          [[Lualine: lualine will stop supporting vimscript soon, change your config to lua or wrap it around lua << EOF ... EOF]]) -- luacheck: ignore
-    end)
-    config = config_module.apply_configuration(vim.g.lualine)
-  else
-    config = config_module.apply_configuration({})
-  end
+  config = config_module.apply_configuration(user_config)
   setup_augroup()
   setup_theme()
   loader.load_all(config)