diff -pruN 1.86+dfsg-1/debian/changelog 1.86+dfsg-1ubuntu1/debian/changelog
--- 1.86+dfsg-1/debian/changelog	2025-10-29 22:16:49.000000000 +0000
+++ 1.86+dfsg-1ubuntu1/debian/changelog	2026-04-08 17:38:55.000000000 +0000
@@ -1,3 +1,15 @@
+python-biopython (1.86+dfsg-1ubuntu1) resolute; urgency=medium
+
+  * Do not treat Sphinx warnings as errors (LP: #2147029)
+
+ -- Graham Inggs <ginggs@ubuntu.com>  Wed, 08 Apr 2026 17:38:55 +0000
+
+python-biopython (1.86+dfsg-1build1) resolute; urgency=medium
+
+  * No-change rebuild to drop Python 3.13 bits.
+
+ -- Matthias Klose <doko@ubuntu.com>  Fri, 20 Mar 2026 11:18:05 +0100
+
 python-biopython (1.86+dfsg-1) unstable; urgency=medium
 
   * New upstream version 1.86+dfsg
diff -pruN 1.86+dfsg-1/debian/control 1.86+dfsg-1ubuntu1/debian/control
--- 1.86+dfsg-1/debian/control	2025-10-29 22:16:49.000000000 +0000
+++ 1.86+dfsg-1ubuntu1/debian/control	2026-04-08 16:54:02.000000000 +0000
@@ -1,5 +1,6 @@
 Source: python-biopython
-Maintainer: Debian Med Packaging Team <debian-med-packaging@lists.alioth.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian Med Packaging Team <debian-med-packaging@lists.alioth.debian.org>
 Uploaders: Charles Plessy <plessy@debian.org>,
            Andreas Tille <tille@debian.org>,
            Étienne Mollier <emollier@debian.org>
diff -pruN 1.86+dfsg-1/debian/patches/series 1.86+dfsg-1ubuntu1/debian/patches/series
--- 1.86+dfsg-1/debian/patches/series	2025-10-29 22:16:49.000000000 +0000
+++ 1.86+dfsg-1ubuntu1/debian/patches/series	2026-04-08 16:51:29.000000000 +0000
@@ -3,3 +3,4 @@ privacy_breach.patch
 privacy_breach_ie9.patch
 #port_tutorial_to_muscle3.patch
 fix-type-cast-i386.patch
+sphinx-warnings.patch
diff -pruN 1.86+dfsg-1/debian/patches/sphinx-warnings.patch 1.86+dfsg-1ubuntu1/debian/patches/sphinx-warnings.patch
--- 1.86+dfsg-1/debian/patches/sphinx-warnings.patch	1970-01-01 00:00:00.000000000 +0000
+++ 1.86+dfsg-1ubuntu1/debian/patches/sphinx-warnings.patch	2026-04-08 17:38:43.000000000 +0000
@@ -0,0 +1,15 @@
+Description: Do not treat Sphinx warnings as errors
+Author: Graham Inggs <ginggs@debian.org>
+Last-Update: 2026-04-08
+
+--- a/Doc/Makefile
++++ b/Doc/Makefile
+@@ -2,7 +2,7 @@
+ #
+ 
+ # You can set these variables from the command line.
+-SPHINXOPTS    = -W --keep-going
++SPHINXOPTS    = --keep-going
+ SPHINXBUILD   = sphinx-build
+ SPHINXPROJ    = Bio
+ SOURCEDIR     = .