diff --git a/debian/copyright b/debian/copyright
index 2fb8e531..5a224176 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -13,6 +13,57 @@ Copyright: 2013-2015 Max Lv <max.c.lv@gmail.com>
            2015, Boyuan Yang <073plan@gmail.com>
 License: GPL-3+
 
+Files: libcork/Makefile.am libipset/Makefile.am libipset/bdd/Makefile.am libipset/map/Makefile.am libipset/set/Makefile.am
+Copyright: 2005-2008 Lennart Poettering
+License: LGPL-2.1+
+ This package 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.
+ .
+ This package 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 libasyncns. If not, see
+ <http://www.gnu.org/licenses/>.
+ .
+ On Debian systems, the complete text of the GNU Lesser General Public
+ License version 2.1 can be found in "/usr/share/common-licenses/LGPL-2.1".
+
+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.
+
 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