diff --git a/debian/control b/debian/control
index 1c3bedfa..a47e6d28 100644
--- a/debian/control
+++ b/debian/control
@@ -40,7 +40,9 @@ Package: libshadowsocks-libev2
 Architecture: any
 Multi-Arch: same
 Section: libs
+Replaces: libshadowsocks-libev1
 Breaks:
+ libshadowsocks-libev1,
  shadowsocks-libev (<< 2.4.0),
 Pre-Depends:
  ${misc:Pre-Depends},
diff --git a/debian/copyright b/debian/copyright
index 457f1fb5..d4fe3cfa 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -50,12 +50,35 @@ Files: doc/*
 Copyright: 2012-2016, Max Lv <max.c.lv@gmail.com>
 License: GFDL-1.1+
 
+Files: m4/ax_pthread.m4
+Copyright: 2008 Steven G. Johnson <stevenj@alum.mit.edu>
+           2011 Daniel Richard G. <skunk@iSKUNK.ORG>
+License: GPL-3+ with Autoconf exception
+
+Files: m4/ax_tls.m4
+Copyright: 2008 Alan Woodland <ajw05@aber.ac.uk>
+           2010 Diego Elio Petteno` <flameeyes@gmail.com>
+License: GPL-3+ with Autoconf exception
+
+Files: m4/pcre.m4
+Copyright: 2015 Syrone Wong <wong.syrone@gmail.com>
+License: Apache-2.0
+
+Files: m4/stack-protector.m4
+Copyright: 2007 Google Inc.
+License: Apache-2.0
+
 Files: src/json.c src/json.h
 Copyright: 2012-2014, James McLaughlin et al.
 License: BSD-2-clause
 
-Files: src/resolv.c src/resolv.h
-Copyright: 2014, Dustin Lundquist <dustin@null-ptr.net>
+Files: src/http.c src/http.h src/protocol.h src/resolv.c src/resolv.h src/tls.c src/tls.h
+Copyright: 2011-2014, Dustin Lundquist <dustin@null-ptr.net>
+License: BSD-2-clause
+
+Files: src/rule.c src/rule.h
+Copyright: 2011-2012, Dustin Lundquist <dustin@null-ptr.net>
+           2011, Manuel Kasper <mk@neon1.net>
 License: BSD-2-clause
 
 Files: src/ss-nat
@@ -84,6 +107,25 @@ License: BSD-1-clause
  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+License: Apache-2.0
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+ .
+         http://www.apache.org/licenses/LICENSE-2.0
+ .
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ .
+ On Debian systems, the complete text of the Apache version 2.0 license
+ can be found in "/usr/share/common-licenses/Apache-2.0".
+
 License: BSD-2-clause
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
@@ -133,3 +175,30 @@ License: GPL-3+
  .
  On Debian systems, the complete text of the GNU General
  Public License version 3 can be found in "/usr/share/common-licenses/GPL-3".
+
+License: GPL-3+ with Autoconf exception
+ 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 the
+ Free Software Foundation, either version 3 of the License, or (at your
+ option) any later version.
+ .
+ This program 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 General
+ Public License for more details.
+ .
+ You should have received a copy of the GNU General Public License along
+ with this program. If not, see <http://www.gnu.org/licenses/>.
+ .
+ As a special exception, the respective Autoconf Macro's copyright owner
+ gives unlimited permission to copy, distribute and modify the configure
+ scripts that are the output of Autoconf when processing the Macro. You
+ need not follow the terms of the GNU General Public License when using
+ or distributing such scripts, even though portions of the text of the
+ Macro appear in them. The GNU General Public License (GPL) does govern
+ all other use of the material that constitutes the Autoconf Macro.
+ .
+ This special exception to the GPL applies to versions of the Autoconf
+ 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.