diff --git a/debian/copyright b/debian/copyright
index 7f9b1d76..1644c086 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -46,6 +46,10 @@ License: BSD-3-clause
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+Files: man/*
+Copyright: 2012-2016, Max Lv <max.c.lv@gmail.com>
+License: GFDL-1.1+
+
 Files: src/json.c src/json.h
 Copyright: 2012-2014, James McLaughlin et al.
 License: BSD-2-clause
@@ -104,6 +108,15 @@ License: BSD-2-clause
  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  SUCH DAMAGE.
 
+License: GFDL-1.1+
+ Permission is granted to copy, distribute and/or modify this document
+ under the terms of the GNU Free Documentation License, Version 1.1 or
+ any later version published by the Free Software Foundation;
+ with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+ .
+ A copy of the license is included in the section entitled
+ "GNU Free Documentation License".
+
 License: GPL-3+
  This package 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/install b/debian/install
deleted file mode 100644
index 77e59fba..00000000
--- a/debian/install
+++ /dev/null
@@ -1 +0,0 @@
-debian/config.json  /etc/shadowsocks-libev
diff --git a/debian/rules b/debian/rules
index 30fabbf4..36c54345 100755
--- a/debian/rules
+++ b/debian/rules
@@ -22,4 +22,4 @@ override_dh_installchangelogs:
 	dh_installchangelogs -XChanges
 
 %:
-	dh $@  --with systemd
+	dh $@ --with systemd
diff --git a/debian/docs b/debian/shadowsocks-libev.docs
similarity index 81%
rename from debian/docs
rename to debian/shadowsocks-libev.docs
index 92c80c5a..0d4e47d0 100644
--- a/debian/docs
+++ b/debian/shadowsocks-libev.docs
@@ -1,2 +1,3 @@
+AUTHORS
 README.md
 debian/copyright.original
diff --git a/debian/shadowsocks-libev.install b/debian/shadowsocks-libev.install
index 97e58119..68cdab23 100644
--- a/debian/shadowsocks-libev.install
+++ b/debian/shadowsocks-libev.install
@@ -1,4 +1,4 @@
 usr/bin/
 usr/share/man/
-debian/config.json  etc/shadowsocks-libev
+debian/config.json usr/share/shadowsocks-libev
 debian/shadowsocks-libev-*.service lib/systemd/system
diff --git a/debian/shadowsocks-libev.postinst b/debian/shadowsocks-libev.postinst
index 92b240e9..58451ed8 100755
--- a/debian/shadowsocks-libev.postinst
+++ b/debian/shadowsocks-libev.postinst
@@ -4,7 +4,12 @@ set -e
 
 case "$1" in
 	configure|reconfigure)
-		# continue
+		if [ ! -f /etc/shadowsocks-libev/config.json ]; then
+			passwd=$(apg -n 1 -M ncl)
+			mkdir -p /etc/shadowsocks-libev
+			sed "s/barfoo!/$passwd/" /usr/share/shadowsocks-libev/config.json \
+				> /etc/shadowsocks-libev/config.json
+		fi
 		;;
 	abort-upgrade|abort-remove|abort-deconfigure)
 		exit 0
@@ -15,9 +20,6 @@ case "$1" in
 		;;
 esac
 
-passwd=$(apg -n 1 -M ncl)
-sed -i "s/barfoo!/$passwd/" /etc/shadowsocks-libev/config.json
-
 #DEBHELPER#
 
 exit 0
diff --git a/debian/shadowsocks-libev.postrm b/debian/shadowsocks-libev.postrm
new file mode 100644
index 00000000..bccb360a
--- /dev/null
+++ b/debian/shadowsocks-libev.postrm
@@ -0,0 +1,22 @@
+#!/bin/sh
+
+set -e
+
+case "$1" in
+	purge)
+		rm -f /etc/shadowsocks-libev/config.json
+		test -f /etc/shadowsocks-libev/* \
+			|| rm -r /etc/shadowsocks-libev/
+		;;
+	remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
+		exit 0
+		;;
+	*)
+		echo "postrm called with unknown argument \`$1'" >&2
+		exit 0
+		;;
+esac
+
+#DEBHELPER#
+
+exit 0
diff --git a/debian/source.lintian-overrides b/debian/source.lintian-overrides
new file mode 100644
index 00000000..f290882b
--- /dev/null
+++ b/debian/source.lintian-overrides
@@ -0,0 +1,4 @@
+# false positive: #505857
+shadowsocks-libev source: debian-watch-file-should-mangle-version
+# false positive: #765166
+shadowsocks-libev source: license-problem-gfdl-invariants