diff -Nru courier-unicode-2.1.2/debian/changelog courier-unicode-2.1.2/debian/changelog
--- courier-unicode-2.1.2/debian/changelog	2020-12-28 14:03:35.000000000 +0000
+++ courier-unicode-2.1.2/debian/changelog	2021-02-16 21:43:32.000000000 +0000
@@ -1,3 +1,14 @@
+courier-unicode (2.1.2-2) unstable; urgency=medium
+
+  * Drop build dependency on pkg-kde-tools.
+  * Bump S-V to 4.5.1, drop d/compat and use debhelper-compat instead,
+    use debian/not-installed and dh_missing to simplify the dh_install
+    invocation and allowing to eliminate the override.
+  * Update d/watch to use version 4 and take a third digint into
+    account.
+
+ -- Markus Wanner <markus@bluegap.ch>  Tue, 16 Feb 2021 22:43:32 +0100
+
 courier-unicode (2.1.2-1) unstable; urgency=medium
 
   * New upstream release 2.1.2.
diff -Nru courier-unicode-2.1.2/debian/compat courier-unicode-2.1.2/debian/compat
--- courier-unicode-2.1.2/debian/compat	2020-12-26 19:28:01.000000000 +0000
+++ courier-unicode-2.1.2/debian/compat	1970-01-01 00:00:00.000000000 +0000
@@ -1 +0,0 @@
-11
diff -Nru courier-unicode-2.1.2/debian/control courier-unicode-2.1.2/debian/control
--- courier-unicode-2.1.2/debian/control	2020-12-26 20:00:51.000000000 +0000
+++ courier-unicode-2.1.2/debian/control	2021-02-16 21:43:32.000000000 +0000
@@ -1,11 +1,10 @@
 Source: courier-unicode
 Priority: optional
 Maintainer: Markus Wanner <markus@bluegap.ch>
-Build-Depends: debhelper (>= 11),
-               pkg-kde-tools,
+Build-Depends: debhelper-compat (= 13),
                unicode-data,
 	       w3c-sgml-lib
-Standards-Version: 4.2.1
+Standards-Version: 4.5.1
 Section: libs
 Homepage: https://www.courier-mta.org/
 Vcs-Git: https://salsa.debian.org/debian/courier-unicode.git
diff -Nru courier-unicode-2.1.2/debian/not-installed courier-unicode-2.1.2/debian/not-installed
--- courier-unicode-2.1.2/debian/not-installed	1970-01-01 00:00:00.000000000 +0000
+++ courier-unicode-2.1.2/debian/not-installed	2021-02-16 21:43:32.000000000 +0000
@@ -0,0 +1 @@
+usr/lib/*/libcourier-unicode.la
diff -Nru courier-unicode-2.1.2/debian/rules courier-unicode-2.1.2/debian/rules
--- courier-unicode-2.1.2/debian/rules	2020-12-26 19:28:01.000000000 +0000
+++ courier-unicode-2.1.2/debian/rules	2021-02-16 21:43:32.000000000 +0000
@@ -15,8 +15,6 @@
 # package maintainers to append LDFLAGS
 export DEB_LDFLAGS_MAINT_APPEND = -Wl,--as-needed
 
-export DPKG_GENSYMBOLS_CHECK_LEVEL=4
-
 include /usr/share/dpkg/default.mk
 
 , := ,
@@ -29,7 +27,7 @@
 
 # main packaging script based on dh7 syntax
 %:
-	dh $@ --with autoreconf,pkgkde_symbolshelper
+	dh $@
 
 override_dh_autoreconf:
 	cp unicode_ultcasetab.c unicode_ultcasetab.c.orig
@@ -53,9 +51,6 @@
 		|| mv -v unicode_ultcasetab.c.orig unicode_ultcasetab.c
 	dh_auto_clean
 
-override_dh_install:
-	dh_install --fail-missing -X.la
-
 override_dh_gencontrol:
 	echo "Built-Using=$(BUILT_USING)" >> debian/libcourier-unicode4.substvars
 	dh_gencontrol
diff -Nru courier-unicode-2.1.2/debian/watch courier-unicode-2.1.2/debian/watch
--- courier-unicode-2.1.2/debian/watch	2020-12-26 19:28:01.000000000 +0000
+++ courier-unicode-2.1.2/debian/watch	2021-02-16 21:43:32.000000000 +0000
@@ -1,6 +1,3 @@
-version=3
-# qa.debian.org runs a redirector which allows a simpler form of URL
-# for SourceForge based projects. The format below will automatically
-# be rewritten to use the redirector.
+version=4
 opts=pgpsigurlmangle=s/$/.sig/ \
-https://sf.net/courier/courier-unicode-(\d+\.\d+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))
+https://sf.net/courier/courier-unicode-(\d[\.\d]*)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))