diff --git a/e44509b5e4.patch b/e44509b5e4.patch
new file mode 100644
index 0000000..879c992
--- /dev/null
+++ b/e44509b5e4.patch
@@ -0,0 +1,104 @@
+From e44509b5e42525f30b62137599e574fdd41f68bc Mon Sep 17 00:00:00 2001
+From: Benjamin Moran <benmoran@protonmail.com>
+Date: Tue, 24 Nov 2020 11:42:02 +0900
+Subject: [PATCH] Simplify UBO code, and revert some experimental code.
+
+---
+ RELEASE_NOTES                     |  8 ++++++
+ pyglet/text/formats/attributed.py | 41 +++++++------------------------
+ 2 files changed, 17 insertions(+), 32 deletions(-)
+
+diff --git a/RELEASE_NOTES b/RELEASE_NOTES
+index 5c4fe67a..f084a013 100644
+--- a/RELEASE_NOTES
++++ b/RELEASE_NOTES
+@@ -1,3 +1,11 @@
++pyglet 1.5.12
++Bugfix and feature release
++
++Bugfixes
++--------
++- Remove usage of deprecated `parser` module. (#312)
++
++
+ pyglet 1.5.11
+ Bugfix release
+ 
+diff --git a/pyglet/text/formats/attributed.py b/pyglet/text/formats/attributed.py
+index 350e0844..3eb815c6 100644
+--- a/pyglet/text/formats/attributed.py
++++ b/pyglet/text/formats/attributed.py
+@@ -38,11 +38,7 @@
+ """
+ 
+ import re
+-import token
+-import parser
+-import operator
+-
+-from functools import reduce
++import ast
+ 
+ import pyglet
+ 
+@@ -63,11 +59,13 @@
+ 
+ 
+ class AttributedTextDecoder(pyglet.text.DocumentDecoder):
+-    def decode(self, text, location=None):
+-        self.doc = pyglet.text.document.FormattedDocument()
+ 
++    def __init__(self):
++        self.doc = pyglet.text.document.FormattedDocument()
+         self.length = 0
+         self.attributes = {}
++
++    def decode(self, text, location=None):
+         next_trailing_space = True
+         trailing_newline = True
+ 
+@@ -90,22 +88,15 @@ def decode(self, text, location=None):
+                 self.append(m.group('nl_para')[1:])  # ignore the first \n
+                 trailing_newline = True
+             elif group == 'attr':
+-                try:
+-                    ast = parser.expr(m.group('attr_val'))
+-                    if self.safe(ast):
+-                        val = eval(ast.compile())
+-                    else:
+-                        val = None
+-                except (parser.ParserError, SyntaxError):
+-                    val = None
++                value = ast.literal_eval(m.group('attr_val'))
+                 name = m.group('attr_name')
+                 if name[0] == '.':
+                     if trailing_newline:
+-                        self.attributes[name[1:]] = val
++                        self.attributes[name[1:]] = value
+                     else:
+-                        self.doc.set_paragraph_style(self.length, self.length, {name[1:]: val})
++                        self.doc.set_paragraph_style(self.length, self.length, {name[1:]: value})
+                 else:
+-                    self.attributes[name] = val
++                    self.attributes[name] = value
+             elif group == 'escape_dec':
+                 self.append(chr(int(m.group('escape_dec_val'))))
+             elif group == 'escape_hex':
+@@ -122,17 +113,3 @@ def append(self, text):
+         self.doc.insert_text(self.length, text, self.attributes)
+         self.length += len(text)
+         self.attributes.clear()
+-
+-    _safe_names = ('True', 'False', 'None')
+-
+-    def safe(self, ast):
+-        tree = ast.totuple()
+-        return self.safe_node(tree)
+-
+-    def safe_node(self, node):
+-        if token.ISNONTERMINAL(node[0]):
+-            return reduce(operator.and_, map(self.safe_node, node[1:]))
+-        elif node[0] == token.NAME:
+-            return node[1] in self._safe_names
+-        else:
+-            return True
diff --git a/python-pyglet.spec b/python-pyglet.spec
index d16a0d3..33f6fc7 100644
--- a/python-pyglet.spec
+++ b/python-pyglet.spec
@@ -19,6 +19,11 @@ URL: http://www.pyglet.org/
 Source0: %{versionedname}-repacked.tar.gz
 Source1: pyglet-get-tarball.sh
 
+# Remove usage of the deprecated `parser` module.
+# This makes pyglet compatible with Python 3.10a.
+# Merged upstream.
+Patch0: https://github.com/pyglet/pyglet/commit/e44509b5e4.patch
+
 BuildArch: noarch
 
 # Tests (and possibly sound synthesis?) fail on big-endian.
@@ -86,7 +91,7 @@ BuildRequires: python3-pillow
 
 
 %prep
-%setup -q -n %{versionedname}
+%autosetup -p1 -n %{versionedname}
 
 # Remove the bundled pypng library (python-pillow provides the same functionality)
 rm pyglet/image/codecs/png.py