diff --git a/Formula/avr-gcc@13.rb b/Formula/avr-gcc@13.rb
index a75961b..d9ca1c3 100644
--- a/Formula/avr-gcc@13.rb
+++ b/Formula/avr-gcc@13.rb
@@ -7,6 +7,7 @@ class AvrGccAT13 < Formula
   sha256 "e275e76442a6067341a27f04c5c6b83d8613144004c0413528863dc6b5c743da"
 
   license "GPL-3.0-or-later" => { with: "GCC-exception-3.1" }
+  revision 1
 
   head "https://gcc.gnu.org/git/gcc.git", branch: "master"
 
@@ -44,19 +45,11 @@ class AvrGccAT13 < Formula
   # GCC bootstraps itself, so it is OK to have an incompatible C++ stdlib
   cxxstdlib_check :skip
 
-  current_build = build
+  build
 
   resource "avr-libc" do
-    url "https://download.savannah.gnu.org/releases/avr-libc/avr-libc-2.1.0.tar.bz2"
-    mirror "https://download-mirror.savannah.gnu.org/releases/avr-libc/avr-libc-2.1.0.tar.bz2"
-    sha256 "0b84cee5c08b5d5cba67c36125e5aaa85251bc9accfba5773bfa87bc34b654e8"
-
-    if current_build.with? "ATMega168pbSupport"
-      patch do
-        url "https://raw.githubusercontent.com/osx-cross/homebrew-avr/d2e2566b06b90355952ed996707a0a1a24673cd3/Patch/avr-libc-add-mcu-atmega168pb.patch"
-        sha256 "7a2bf2e11cfd9335e8e143eecb94480b4871e8e1ac54392c2ee2d89010b43711"
-      end
-    end
+    url "https://github.com/avrdudes/avr-libc/releases/download/avr-libc-2_2_1-release/avr-libc-2.2.1.tar.bz2"
+    sha256 "006a6306cbbc938c3bdb583ac54f93fe7d7c8cf97f9cde91f91c6fb0273ab465"
   end
 
   if Hardware::CPU.arm?