diff -Nru beets-1.4.9/debian/changelog beets-1.4.9/debian/changelog
--- beets-1.4.9/debian/changelog	2020-07-10 23:11:12.000000000 +0000
+++ beets-1.4.9/debian/changelog	2020-08-12 18:28:00.000000000 +0000
@@ -1,3 +1,16 @@
+beets (1.4.9-7) unstable; urgency=medium
+
+  * Bump Build-Depends on python3-mutagen, to help the migration autopkgtests.
+
+ -- Stefano Rivera <stefanor@debian.org>  Wed, 12 Aug 2020 11:28:00 -0700
+
+beets (1.4.9-6) unstable; urgency=medium
+
+  * Patch: Compatibility with Werkzeug 1.0. (Closes: #967023)
+  * Patch: Compatibility with Mutagen 1.45 in tests.
+
+ -- Stefano Rivera <stefanor@debian.org>  Tue, 04 Aug 2020 21:52:05 -0700
+
 beets (1.4.9-5) unstable; urgency=medium
 
   * Fix ast module usage, broken by python 3.8.4~rc1-1, causing FTBFS and
diff -Nru beets-1.4.9/debian/control beets-1.4.9/debian/control
--- beets-1.4.9/debian/control	2020-07-10 23:11:12.000000000 +0000
+++ beets-1.4.9/debian/control	2020-08-12 18:28:00.000000000 +0000
@@ -16,7 +16,7 @@
  python3-mpd,
  python3-munkres,
  python3-musicbrainzngs,
- python3-mutagen,
+ python3-mutagen (>= 1.45),
  python3-pylast,
  python3-rarfile,
  python3-responses,
diff -Nru beets-1.4.9/debian/patches/mutagen-1.45 beets-1.4.9/debian/patches/mutagen-1.45
--- beets-1.4.9/debian/patches/mutagen-1.45	1970-01-01 00:00:00.000000000 +0000
+++ beets-1.4.9/debian/patches/mutagen-1.45	2020-08-12 18:28:00.000000000 +0000
@@ -0,0 +1,27 @@
+From: Stefano Rivera <stefanor@debian.org>
+Date: Tue, 4 Aug 2020 21:44:56 -0700
+Subject: Don't test for WavPack bit-depth of 0
+
+mutagen 1.45 will return the correct value of 16
+
+Origin: upstream, https://github.com/beetbox/mediafile/commit/d2fc3b59f77c515b02dfe7ad936f89264375d2b4
+Bug-Upstream: https://github.com/beetbox/mediafile/issues/34
+Author: Adrian Sampson <adrian@radbox.org>
+Bug-Debian: https://bugs.debian.org/967023
+---
+ test/test_mediafile.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/test/test_mediafile.py b/test/test_mediafile.py
+index 8668780..8028a4f 100644
+--- a/test/test_mediafile.py
++++ b/test/test_mediafile.py
+@@ -888,7 +888,7 @@ class WavpackTest(ReadWriteTestBase, unittest.TestCase):
+         'bitrate': 109312,
+         'format': u'WavPack',
+         'samplerate': 44100,
+-        'bitdepth': 0,
++        'bitdepth': 16,
+         'channels': 1,
+     }
+ 
diff -Nru beets-1.4.9/debian/patches/series beets-1.4.9/debian/patches/series
--- beets-1.4.9/debian/patches/series	2020-07-10 23:11:12.000000000 +0000
+++ beets-1.4.9/debian/patches/series	2020-08-12 18:28:00.000000000 +0000
@@ -4,3 +4,5 @@
 skip-buildd-failures
 mutagen-1.43
 python-3.8-ast
+werkzeug-1.0
+mutagen-1.45
diff -Nru beets-1.4.9/debian/patches/werkzeug-1.0 beets-1.4.9/debian/patches/werkzeug-1.0
--- beets-1.4.9/debian/patches/werkzeug-1.0	1970-01-01 00:00:00.000000000 +0000
+++ beets-1.4.9/debian/patches/werkzeug-1.0	2020-08-12 18:28:00.000000000 +0000
@@ -0,0 +1,24 @@
+From: Stefano Rivera <stefanor@debian.org>
+Date: Tue, 4 Aug 2020 21:34:27 -0700
+Subject: Compatibility with Werkzeug 1.0
+
+Origin: upstream, https://github.com/beetbox/beets/commit/d43d54e21cde97f57f19486925ab56b419254cc8
+Author: Adrian Sampson <adrian@radbox.org>
+Bug-Debian: https://bugs.debian.org/967023
+---
+ beetsplug/web/__init__.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/beetsplug/web/__init__.py b/beetsplug/web/__init__.py
+index f53fb3a..21ff5d9 100644
+--- a/beetsplug/web/__init__.py
++++ b/beetsplug/web/__init__.py
+@@ -169,7 +169,7 @@ class IdListConverter(BaseConverter):
+         return ids
+ 
+     def to_url(self, value):
+-        return ','.join(value)
++        return ','.join(str(v) for v in value)
+ 
+ 
+ class QueryConverter(PathConverter):