diff -Nru libktoblzcheck-1.53/debian/changelog libktoblzcheck-1.53/debian/changelog
--- libktoblzcheck-1.53/debian/changelog	2022-04-15 15:29:52.000000000 +0000
+++ libktoblzcheck-1.53/debian/changelog	2024-02-28 13:32:23.000000000 +0000
@@ -1,3 +1,10 @@
+libktoblzcheck (1.53-3.1) unstable; urgency=medium
+
+  * Non-maintainer upload.
+  * Rename libraries for 64-bit time_t transition.  Closes: #1062395
+
+ -- Benjamin Drung <bdrung@debian.org>  Wed, 28 Feb 2024 13:32:23 +0000
+
 libktoblzcheck (1.53-3) unstable; urgency=medium
 
   [ Debian Janitor ]
diff -Nru libktoblzcheck-1.53/debian/control libktoblzcheck-1.53/debian/control
--- libktoblzcheck-1.53/debian/control	2022-04-15 15:26:11.000000000 +0000
+++ libktoblzcheck-1.53/debian/control	2024-02-28 13:32:22.000000000 +0000
@@ -3,7 +3,7 @@
 Priority: optional
 Maintainer: Micha Lenk <micha@debian.org>
 Uploaders: Henning Glawe <glaweh@debian.org>
-Build-Depends: debhelper-compat (= 13),
+Build-Depends: dpkg-dev (>= 1.22.5), debhelper-compat (= 13),
  dh-python,
  cmake,
  python3-all-dev
@@ -11,13 +11,16 @@
 Vcs-Browser: https://salsa.debian.org/aqbanking-team/pkg-ktoblzcheck
 Vcs-Git: https://salsa.debian.org/aqbanking-team/pkg-ktoblzcheck.git
 
-Package: libktoblzcheck1v5
+Package: libktoblzcheck1t64
+Provides: ${t64:Provides}
+X-Time64-Compat: libktoblzcheck1v5
+Breaks: libktoblzcheck1v5 (<< ${source:Version})
 Architecture: any
 Multi-Arch: same
 Depends: ${shlibs:Depends}, ${perl:Depends}, ${misc:Depends}
 Suggests: ktoblzcheck
 Conflicts: libktoblzcheck1c2a
-Replaces: libktoblzcheck1c2a
+Replaces: libktoblzcheck1v5, libktoblzcheck1c2a
 Description: library for verification of account numbers and bank codes
  libktoblzcheck is a library for verification of bank account numbers and bank
  codes (BLZ) of German Banks. It is based on the specifications of the
@@ -28,7 +31,7 @@
 Section: libdevel
 Architecture: any
 Multi-Arch: same
-Depends: libktoblzcheck1v5 (= ${binary:Version}), ${misc:Depends}
+Depends: libktoblzcheck1t64 (= ${binary:Version}), ${misc:Depends}
 Description: library for verification of account numbers and bank codes (development files)
  libktoblzcheck is a library for verification of bank account numbers and bank
  codes (BLZ) of German Banks. It is based on the specifications of the
diff -Nru libktoblzcheck-1.53/debian/libktoblzcheck1t64.install libktoblzcheck-1.53/debian/libktoblzcheck1t64.install
--- libktoblzcheck-1.53/debian/libktoblzcheck1t64.install	1970-01-01 00:00:00.000000000 +0000
+++ libktoblzcheck-1.53/debian/libktoblzcheck1t64.install	2019-10-06 18:52:09.000000000 +0000
@@ -0,0 +1,2 @@
+usr/lib/*/lib*.so.*
+usr/share/ktoblzcheck
diff -Nru libktoblzcheck-1.53/debian/libktoblzcheck1t64.lintian-overrides libktoblzcheck-1.53/debian/libktoblzcheck1t64.lintian-overrides
--- libktoblzcheck-1.53/debian/libktoblzcheck1t64.lintian-overrides	1970-01-01 00:00:00.000000000 +0000
+++ libktoblzcheck-1.53/debian/libktoblzcheck1t64.lintian-overrides	2024-02-28 13:32:16.000000000 +0000
@@ -0,0 +1 @@
+libktoblzcheck1t64: package-name-doesnt-match-sonames libktoblzcheck1v5
diff -Nru libktoblzcheck-1.53/debian/libktoblzcheck1t64.postrm libktoblzcheck-1.53/debian/libktoblzcheck1t64.postrm
--- libktoblzcheck-1.53/debian/libktoblzcheck1t64.postrm	1970-01-01 00:00:00.000000000 +0000
+++ libktoblzcheck-1.53/debian/libktoblzcheck1t64.postrm	2019-10-06 13:42:00.000000000 +0000
@@ -0,0 +1,32 @@
+#!/bin/sh
+# postrm script for libktoblzcheck
+
+set -e
+
+bankdatadir=/var/lib/ktoblzcheck1
+
+case "$1" in
+    purge)
+	# remove out-of-package bankdata files possibly generated by
+	# online_update.pl script:
+	if [ -d $bankdatadir ]; then
+	    rm $bankdatadir/bankdata_[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9].txt 2> /dev/null || true
+	    rmdir $bankdatadir 2> /dev/null || true
+	fi
+    ;;
+
+    remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
+    ;;
+
+    *)
+        echo "postrm called with unknown argument \`$1'" >&2
+        exit 1
+    ;;
+esac
+
+# dh_installdeb will replace this with shell code automatically
+# generated by other debhelper scripts.
+
+#DEBHELPER#
+
+exit 0
diff -Nru libktoblzcheck-1.53/debian/libktoblzcheck1v5.install libktoblzcheck-1.53/debian/libktoblzcheck1v5.install
--- libktoblzcheck-1.53/debian/libktoblzcheck1v5.install	2019-10-06 18:52:09.000000000 +0000
+++ libktoblzcheck-1.53/debian/libktoblzcheck1v5.install	1970-01-01 00:00:00.000000000 +0000
@@ -1,2 +0,0 @@
-usr/lib/*/lib*.so.*
-usr/share/ktoblzcheck
diff -Nru libktoblzcheck-1.53/debian/libktoblzcheck1v5.postrm libktoblzcheck-1.53/debian/libktoblzcheck1v5.postrm
--- libktoblzcheck-1.53/debian/libktoblzcheck1v5.postrm	2019-10-06 13:42:00.000000000 +0000
+++ libktoblzcheck-1.53/debian/libktoblzcheck1v5.postrm	1970-01-01 00:00:00.000000000 +0000
@@ -1,32 +0,0 @@
-#!/bin/sh
-# postrm script for libktoblzcheck
-
-set -e
-
-bankdatadir=/var/lib/ktoblzcheck1
-
-case "$1" in
-    purge)
-	# remove out-of-package bankdata files possibly generated by
-	# online_update.pl script:
-	if [ -d $bankdatadir ]; then
-	    rm $bankdatadir/bankdata_[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9].txt 2> /dev/null || true
-	    rmdir $bankdatadir 2> /dev/null || true
-	fi
-    ;;
-
-    remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
-    ;;
-
-    *)
-        echo "postrm called with unknown argument \`$1'" >&2
-        exit 1
-    ;;
-esac
-
-# dh_installdeb will replace this with shell code automatically
-# generated by other debhelper scripts.
-
-#DEBHELPER#
-
-exit 0