diff --git a/debian/control b/debian/control
index c8578bad..f93a4b47 100644
--- a/debian/control
+++ b/debian/control
@@ -1,13 +1,12 @@
 Source: ngcp-ngcpcfg
 Section: admin
-Priority: optional
 Maintainer: Sipwise Development Team <support@sipwise.com>
 Homepage: https://www.sipwise.com/
 Standards-Version: 4.7.2
 Build-Depends:
- asciidoctor,
  debhelper-compat (= 13),
  dh-sequence-bash-completion,
+ asciidoctor,
  fakeroot,
  git,
  libcapture-tiny-perl,
diff --git a/debian/copyright b/debian/copyright
index 41477344..1493021c 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -5,7 +5,7 @@ Upstream-Contact: Sipwise Development Team <support@sipwise.com>
 Files:
  *
 Copyright:
- Copyright © 2007-2025 Sipwise GmbH, Austria
+ 2007-2025 Sipwise GmbH, Austria
 License: GPL-3+
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -26,10 +26,10 @@ Comment:
 Files:
  hooks/pre-commit
 Copyright:
- Copyright © 2007-2016 Joey Hess <id@joeyh.name>
- Copyright © 2014 Pim van den Berg <pim@nethuis.nl>
- Copyright © 2013 Zdenek Crha <zdenek.crha@gmail.com>
- Copyright © 2008 Scott Bronson <b.git@u32.net>
+ 2007-2016 Joey Hess <id@joeyh.name>
+ 2014 Pim van den Berg <pim@nethuis.nl>
+ 2013 Zdenek Crha <zdenek.crha@gmail.com>
+ 2008 Scott Bronson <b.git@u32.net>
 License: GPL-2+
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
diff --git a/debian/ngcp-ngcpcfg.postinst b/debian/ngcp-ngcpcfg.postinst
index c1fcd5a5..0c9abcf7 100644
--- a/debian/ngcp-ngcpcfg.postinst
+++ b/debian/ngcp-ngcpcfg.postinst
@@ -20,14 +20,11 @@ case "$1" in
   ;;
 
   *)
-    echo "postinst called with unknown argument \`$1'" >&2
+    echo "postinst 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 --git a/debian/ngcpcfg.completion b/debian/ngcpcfg.completion
index 0f5b2337..eeceacfe 100644
--- a/debian/ngcpcfg.completion
+++ b/debian/ngcpcfg.completion
@@ -157,4 +157,4 @@ _ngcpcfg()
 } &&
 complete -F _ngcpcfg ngcpcfg ngcp-config
 
-# ex: filetype=sh
+# ex: filetype=bash
diff --git a/debian/rules b/debian/rules
index 9ffc2d73..749c1a6a 100755
--- a/debian/rules
+++ b/debian/rules
@@ -2,12 +2,13 @@
 # -*- makefile -*-
 
 # Uncomment this to turn on verbose mode.
-# export DH_VERBOSE=1
+#export DH_VERBOSE = 1
 
 SCRIPTS = \
 	$(CURDIR)/usr/sbin/ngcp-instances-validator \
 	$(CURDIR)/usr/sbin/ngcp-network \
-	$(CURDIR)/usr/sbin/ngcp-network-validator
+	$(CURDIR)/usr/sbin/ngcp-network-validator \
+	# EOL
 
 %:
 	dh $@
@@ -15,7 +16,7 @@ SCRIPTS = \
 override_dh_auto_build:
 	dh_testdir
 	$(MAKE) man
-	# catch any syntax errors *before* building the .deb
+	# Catch any syntax errors *before* building the ".deb".
 	$(MAKE) syntaxcheck
 
 execute_after_dh_install:
@@ -26,9 +27,9 @@ execute_after_dh_install:
 	done
 
 execute_after_dh_auto_test:
-	## this is a hack to automatically copy the pytest result via pbuilder to
-	## the workspace so we can automatically use it as Jenkins test result
-	# starting with pbuilder v0.216 it defaults to /build
+	## This is a hack to automatically copy the pytest result via pbuilder to
+	## the workspace so we can automatically use it as Jenkins test result.
+	# Starting with pbuilder v0.216 it defaults to "/build".
 	if [ -d /build/ ] ; then find $(CURDIR)/results/ -name pytest.xml -exec cp {} /build/ \; || true ; fi
-	# previous pbuilder versions default to /tmp/buildd
+	# Previous pbuilder versions default to "/tmp/buildd".
 	if [ -d /tmp/buildd/ ] ; then find $(CURDIR)/results/ -name pytest.xml -exec cp {} /tmp/buildd/ \; || true ; fi