diff --git a/lua/catppuccin/lib/mapper.lua b/lua/catppuccin/lib/mapper.lua
index 4139421e..a98379d6 100644
--- a/lua/catppuccin/lib/mapper.lua
+++ b/lua/catppuccin/lib/mapper.lua
@@ -26,47 +26,46 @@ end
 
 function M.apply(flavour)
 	flavour = flavour or require("catppuccin").flavour
-	-- Borrowing global var
-	_G._O = O
-	_G._C = C
-	_G._U = U
 
-	_G.O = require("catppuccin").options
-	_G.C = require("catppuccin.palettes").get_palette(flavour)
-	_G.U = require "catppuccin.utils.colors"
+	local env = {
+		O = require("catppuccin").options,
+		C = require("catppuccin.palattes").get_palette(flavour),
+		U = require "catppuccin.utils.colors",
+	}
 
-	C.none = "NONE"
+	setmetatable(env, { __index = _G })
 
-	local dim_percentage = O.dim_inactive.percentage
-	C.dim = O.dim_inactive.shade == "dark"
+	local function theme_with_env()
+		C.none = "NONE"
+
+		local dim_percentage = O.dim_inactive.percentage
+		C.dim = O.dim_inactive.shade == "dark"
 			and U.vary_color(
 				{ latte = U.darken(C.base, dim_percentage, C.mantle) },
 				U.darken(C.base, dim_percentage, C.mantle)
 			)
-		or U.vary_color(
-			{ latte = U.lighten("#FBFCFD", dim_percentage, C.base) },
-			U.lighten(C.surface0, dim_percentage, C.base)
-		)
+			or U.vary_color(
+				{ latte = U.lighten("#FBFCFD", dim_percentage, C.base) },
+				U.lighten(C.surface0, dim_percentage, C.base)
+			)
 
-	local theme = {}
-	theme.syntax = require("catppuccin.groups.syntax").get()
-	theme.editor = require("catppuccin.groups.editor").get()
-	theme.integrations = get_integrations() -- plugins
-	theme.terminal = require("catppuccin.groups.terminal").get() -- terminal colors
-	local user_highlights = require("catppuccin").options.highlight_overrides
-	if type(user_highlights[flavour]) == "function" then user_highlights[flavour] = user_highlights[flavour](C) end
-	theme.custom_highlights = vim.tbl_deep_extend(
-		"keep",
-		user_highlights[flavour] or {},
-		type(user_highlights.all) == "function" and user_highlights.all(C) or user_highlights.all or {}
-	)
+		local theme = {}
+		theme.syntax = require("catppuccin.groups.syntax").get()
+		theme.editor = require("catppuccin.groups.editor").get()
+		theme.integrations = get_integrations()                -- plugins
+		theme.terminal = require("catppuccin.groups.terminal").get() -- terminal colors
+		local user_highlights = require("catppuccin").options.highlight_overrides
+		if type(user_highlights[flavour]) == "function" then user_highlights[flavour] = user_highlights[flavour](C) end
+		theme.custom_highlights = vim.tbl_deep_extend(
+			"keep",
+			user_highlights[flavour] or {},
+			type(user_highlights.all) == "function" and user_highlights.all(C) or user_highlights.all or {}
+		)
 
-	-- Returning global var
-	_G.O = _G._O
-	_G.C = _G._C
-	_G.U = _G._U
+		return theme
+	end
 
-	return theme
+	return setfenv(theme_with_env, env)()
 end
 
 return M