diff --git a/53.patch b/53.patch
new file mode 100644
index 0000000..ddea2f2
--- /dev/null
+++ b/53.patch
@@ -0,0 +1,73 @@
+From 9653f31e388a07ce0430bdcde5177ba04733100a Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Lubom=C3=ADr=20Sedl=C3=A1=C5=99?= <lsedlar@redhat.com>
+Date: Wed, 8 Jan 2020 09:36:55 +0100
+Subject: [PATCH] Fix deprecated calls for Python 3.9
+
+The array methods fromstring/tostring have been deprecated since Python
+3.2. Python 3.9 removes them completely.
+
+This was discovered when trying to build gitdb package for Fedora 33.
+https://bugzilla.redhat.com/show_bug.cgi?id=1788660
+---
+ gitdb/pack.py     | 11 ++++++++++-
+ gitdb/test/lib.py | 11 ++++++++++-
+ 2 files changed, 20 insertions(+), 2 deletions(-)
+
+diff --git a/gitdb/pack.py b/gitdb/pack.py
+index 115d943..832a913 100644
+--- a/gitdb/pack.py
++++ b/gitdb/pack.py
+@@ -247,6 +247,15 @@ def write(self, pack_sha, write):
+         return sha
+ 
+ 
++def _frombytes(a, s):
++    """Since Python 3.2 fromstring() is just an alias for frombytes() and is
++    deprecated. Python 3.9 drops the alias."""
++    if sys.version_info.major < 3:
++        a.fromstring(s)
++    else:
++        a.frombytes(s)
++
++
+ class PackIndexFile(LazyMixin):
+ 
+     """A pack index provides offsets into the corresponding pack, allowing to find
+@@ -410,7 +419,7 @@ def offsets(self):
+         if self._version == 2:
+             # read stream to array, convert to tuple
+             a = array.array('I')    # 4 byte unsigned int, long are 8 byte on 64 bit it appears
+-            a.fromstring(buffer(self._cursor.map(), self._pack_offset, self._pack_64_offset - self._pack_offset))
++            _frombytes(a, buffer(self._cursor.map(), self._pack_offset, self._pack_64_offset - self._pack_offset))
+ 
+             # networkbyteorder to something array likes more
+             if sys.byteorder == 'little':
+diff --git a/gitdb/test/lib.py b/gitdb/test/lib.py
+index ab1842d..68e71f2 100644
+--- a/gitdb/test/lib.py
++++ b/gitdb/test/lib.py
+@@ -147,6 +147,15 @@ def copy_files_globbed(source_glob, target_dir, hard_link_ok=False):
+     # END for each file to copy
+ 
+ 
++def _tobytes(a):
++    """Since Python 3.2 tostring() is deprecated and an alias for tobytes().
++    Python 3.9 drops the alias."""
++    if sys.version_info.major < 3:
++        return a.tostring()
++    else:
++        return a.tobytes()
++
++
+ def make_bytes(size_in_bytes, randomize=False):
+     """:return: string with given size in bytes
+     :param randomize: try to produce a very random stream"""
+@@ -157,7 +166,7 @@ def make_bytes(size_in_bytes, randomize=False):
+         random.shuffle(producer)
+     # END randomize
+     a = array('i', producer)
+-    return a.tostring()
++    return _tobytes(a)
+ 
+ 
+ def make_object(type, data):