diff --git a/debian/control b/debian/control
index 6555f745..3358bc93 100644
--- a/debian/control
+++ b/debian/control
@@ -3,7 +3,7 @@ Section: net
 Priority: extra
 Maintainer: Max Lv <max.c.lv@gmail.com>
 Build-Depends:
- asciidoc-base | asciidoc,
+ asciidoc,
  autotools-dev,
  debhelper (>= 9),
  dh-systemd (>= 1.5),
@@ -12,17 +12,15 @@ Build-Depends:
  libssl-dev (>= 0.9.8),
  mime-support,
  pkg-config,
- xmlto,
+ xmlto
 Standards-Version: 3.9.8
 Homepage: https://www.shadowsocks.org
 Vcs-Git: https://github.com/shadowsocks/shadowsocks-libev.git
 Vcs-Browser: https://github.com/shadowsocks/shadowsocks-libev
 
 Package: shadowsocks-libev
-Replaces:
- shadowsocks (<< 1.5.3-2),
-Breaks:
- shadowsocks (<< 1.5.3-2),
+Replaces: shadowsocks (<< 1.5.3-2)
+Breaks: shadowsocks (<< 1.5.3-2)
 Architecture: any
 Depends:
  apg,
@@ -42,11 +40,10 @@ Package: libshadowsocks-libev-dev
 Architecture: any
 Multi-Arch: same
 Section: libdevel
-Breaks:
- shadowsocks-libev (<< 2.4.0),
+Breaks: shadowsocks-libev (<< 2.4.0)
 Depends:
  libshadowsocks-libev2 (= ${binary:Version}),
- ${misc:Depends},
+ ${misc:Depends}
 Description: lightweight and secure socks5 proxy (development files)
  Shadowsocks-libev is a lightweight and secure socks5 proxy for
  embedded devices and low end boxes.
@@ -64,12 +61,11 @@ Section: libs
 Replaces: libshadowsocks-libev1
 Breaks:
  libshadowsocks-libev1,
- shadowsocks-libev (<< 2.4.0),
-Pre-Depends:
- ${misc:Pre-Depends},
+ shadowsocks-libev (<< 2.4.0)
+Pre-Depends: ${misc:Pre-Depends}
 Depends:
  ${misc:Depends},
- ${shlibs:Depends},
+ ${shlibs:Depends}
 Description: lightweight and secure socks5 proxy (shared library)
  Shadowsocks-libev is a lightweight and secure socks5 proxy for
  embedded devices and low end boxes.
diff --git a/debian/copyright b/debian/copyright
index 2149d1b9..a70e4b6a 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -11,41 +11,10 @@ License: GPL-3+
 
 Files: debian/*
 Copyright: 2013-2015, Max Lv <max.c.lv@gmail.com>
-           2015, Boyuan Yang <073plan@gmail.com>
-           2017, Roger Shimizu <rogershimizu@gmail.com>
+           2015-2016, Boyuan Yang <073plan@gmail.com>
+           2016-2017, Roger Shimizu <rogershimizu@gmail.com>
 License: GPL-3+
 
-Files: libcork/* libipset/*
-Copyright: 2011-2013, RedJack, LLC.
-License: BSD-3-clause
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
- .
- Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- .
- Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in
- the documentation and/or other materials provided with the
- distribution.
- .
- Neither the name of RedJack Software, LLC nor the names of its
- contributors may be used to endorse or promote products derived
- from this software without specific prior written permission.
- .
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (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: doc/*
 Copyright: 2012-2017, Max Lv <max.c.lv@gmail.com>
 License: GFDL-1.1+
@@ -68,10 +37,6 @@ Files: m4/stack-protector.m4
 Copyright: 2007 Google Inc.
 License: Apache-2.0
 
-Files: src/base64.c src/base64.h
-Copyright: 2006 Ryan Martell <rdm4@martellventures.com>
-License: LGPL-2.1+
-
 Files: src/json.c src/json.h
 Copyright: 2012-2014, James McLaughlin et al.
 License: BSD-2-clause
@@ -206,20 +171,3 @@ License: GPL-3+ with Autoconf exception
  Macro released by the Autoconf Archive. When you make and distribute a
  modified version of the Autoconf Macro, you may extend this special
  exception to the GPL to apply to your modified version as well.
-
-License: LGPL-2.1+
- This file is part of FFmpeg.
- .
- FFmpeg is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- .
- FFmpeg is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- Lesser General Public License for more details.
- .
- You should have received a copy of the GNU Lesser General Public
- License along with FFmpeg; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA