diff -pruN 4.5.0-6/debian/changelog 4.5.0-6ubuntu1/debian/changelog
--- 4.5.0-6/debian/changelog	2023-05-18 16:20:39.000000000 +0000
+++ 4.5.0-6ubuntu1/debian/changelog	2023-05-24 20:13:57.000000000 +0000
@@ -1,3 +1,11 @@
+tiff (4.5.0-6ubuntu1) mantic; urgency=medium
+
+  * Merge from Debian unstable (LP: #2020707).  Remaining changes:
+    - Don't build with LERC on i386 because it requires numpy
+      (Closes: #1017958)
+
+ -- Amin Bandali <bandali@ubuntu.com>  Wed, 24 May 2023 16:13:57 -0400
+
 tiff (4.5.0-6) unstable; urgency=high
 
   * Backport security fix for CVE-2023-2731, NULL pointer dereference flaw in
@@ -5,6 +13,14 @@ tiff (4.5.0-6) unstable; urgency=high
 
  -- Laszlo Boszormenyi (GCS) <gcs@debian.org>  Thu, 18 May 2023 18:20:39 +0200
 
+tiff (4.5.0-5ubuntu1) lunar; urgency=high
+
+  * Merge from Debian unstable. Remaining differences:
+    - Don't build with LERC on i386 because it requires numpy
+      (Closes: #1017958, LP: #2012540)
+
+ -- Nathan Pratta Teodosio <nathan.teodosio@canonical.com>  Fri, 24 Mar 2023 11:13:09 +0100
+
 tiff (4.5.0-5) unstable; urgency=high
 
   * Backport fix for tiffcrop correctly update buffersize after
@@ -19,6 +35,12 @@ tiff (4.5.0-5) unstable; urgency=high
 
  -- Laszlo Boszormenyi (GCS) <gcs@debian.org>  Sun, 19 Feb 2023 08:46:38 +0100
 
+tiff (4.5.0-4ubuntu1) lunar; urgency=medium
+
+  * Merge from Debian unstable. Remaining differences:
+    - Don't build with LERC on i386 because it requires numpy (Closes: #1017958)
+
+ -- Jeremy Bícha <jbicha@ubuntu.com>  Fri, 03 Feb 2023 18:18:01 -0500
 tiff (4.5.0-4) unstable; urgency=high
 
   * Backport security fix for CVE-2022-48281, heap-based buffer overflow in
@@ -71,6 +93,13 @@ tiff (4.5.0~rc1-1) experimental; urgency
 
  -- Laszlo Boszormenyi (GCS) <gcs@debian.org>  Sat, 10 Dec 2022 10:16:36 +0100
 
+tiff (4.4.0-6ubuntu1) lunar; urgency=critical
+
+  * Merge from Debian unstable. Remaining differences:
+    - Don't build with LERC on i386 because it requires numpy (Closes: #1017958)
+
+ -- Rico Tzschichholz <ricotz@ubuntu.com>  Tue, 29 Nov 2022 12:14:06 +0100
+
 tiff (4.4.0-6) unstable; urgency=high
 
   * Backport security fix for CVE-2022-2519, double free or corruption in
diff -pruN 4.5.0-6/debian/control 4.5.0-6ubuntu1/debian/control
--- 4.5.0-6/debian/control	2022-12-13 15:51:30.000000000 +0000
+++ 4.5.0-6ubuntu1/debian/control	2023-05-24 20:13:57.000000000 +0000
@@ -1,7 +1,8 @@
 Source: tiff
 Section: libs
 Priority: optional
-Maintainer: Laszlo Boszormenyi (GCS) <gcs@debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Laszlo Boszormenyi (GCS) <gcs@debian.org>
 Build-Depends: debhelper-compat (= 13),
                freeglut3-dev,
                libglu1-mesa-dev,
@@ -13,7 +14,7 @@ Build-Depends: debhelper-compat (= 13),
                libxi-dev,
                zlib1g-dev,
                libdeflate-dev,
-               liblerc-dev [!s390x !hppa !powerpc !ppc64 !sparc64],
+               liblerc-dev [!s390x !hppa !powerpc !ppc64 !sparc64 !i386],
                sphinx <!nodoc>
 Standards-Version: 4.6.1
 Homepage: https://libtiff.gitlab.io/libtiff/
@@ -56,7 +57,7 @@ Depends: libc6-dev | libc-dev,
          libtiffxx6 (= ${binary:Version}),
          zlib1g-dev,
          libdeflate-dev,
-         liblerc-dev [!s390x !hppa !powerpc !ppc64 !sparc64],
+         liblerc-dev [!s390x !hppa !powerpc !ppc64 !sparc64 !i386],
          ${misc:Depends}
 Replaces: libtiff4-dev (<< 4.0.3-6~),
           libtiff5-alt-dev (<< 4.0.3-6~),