diff --git a/Formula/gucharmap.rb b/Formula/gucharmap.rb
index b0e7ecadc9..fcb022f951 100644
--- a/Formula/gucharmap.rb
+++ b/Formula/gucharmap.rb
@@ -1,8 +1,8 @@
 class Gucharmap < Formula
   desc "GNOME Character Map, based on the Unicode Character Database"
   homepage "https://wiki.gnome.org/Apps/Gucharmap"
-  url "https://download.gnome.org/sources/gucharmap/11.0/gucharmap-11.0.3.tar.xz"
-  sha256 "6fe4405aa4d2edeedf412befa3cdf423211c80f8836085c4c8c56679658e37fa"
+  url "https://download.gnome.org/sources/gucharmap/12.0/gucharmap-12.0.0.tar.xz"
+  sha256 "cdc3557a38a96d8163f81ce5bdec777bc4b652b0e069fdfa5144f5f0561b0ef9"
 
   bottle do
     rebuild 1
@@ -19,6 +19,11 @@ class Gucharmap < Formula
   depends_on "python" => :build
   depends_on "gtk+3"
 
+  patch do
+    url "https://gitlab.gnome.org/GNOME/gucharmap/commit/f832495aeeeb6b20a598b895261a9d1853005147.patch"
+    sha256 "d86f94bc4b73503d7653ee4ac77fabc00ceca4f9063f33141848af4a335b0f95"
+  end
+
   def install
     xy = Language::Python.major_minor_version "python3"
     ENV.append_path "PYTHONPATH", "#{Formula["libxml2"].opt_lib}/python#{xy}/site-packages"