diff --git a/contrib/debian/copyright b/contrib/debian/copyright
index e7302ff4c..7164656be 100644
--- a/contrib/debian/copyright
+++ b/contrib/debian/copyright
@@ -92,6 +92,12 @@ Files: depends/sources/boost_*.tar.gz
 Copyright: 2008 Beman Dawes
 License: Boost-Software-License-1.0
 
+Files: depends/sources/clang-llvm-*.tar.xz
+Copyright: The libc++ Authors
+License: Apache-2 with LLVM exception
+Comment: This entry is specifically for the libc++ library. The libc++ Authors
+ are listed in https://github.com/llvm/llvm-project/blob/main/libcxx/CREDITS.TXT.
+
 Files: depends/sources/db-*.tar.gz
 Copyright: 1990, 2016 Oracle and/or its affiliates;
  1990, 1993, 1994, 1995 The Regents of the University of California;
@@ -99,6 +105,18 @@ Copyright: 1990, 2016 Oracle and/or its affiliates;
  2000-2005 INRIA, France Telecom
 License: BDB
 
+Files: depends/sources/libevent-*.tar.gz
+Copyright: 2000-2007 Niels Provos <provos@citi.umich.edu>
+ 2007-2012 Niels Provos and Nick Mathewson
+ 2000 Dug Song <dugsong@monkey.org>
+ 1993 The Regents of the University of California.
+ 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ 2003 Michael A. Davis <mike@datanerds.net>
+ 2007 Sun Microsystems
+ 2002 Christopher Clark
+ 2006 Maxim Yegorushkin <maxim.yegorushkin@gmail.com>
+License: BSD-3-clause
+
 Files: depends/sources/zeromq-*.tar.gz
 Copyright:
  1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
@@ -160,6 +178,30 @@ Copyright: 2011, The LevelDB Authors
 License: BSD-3-clause-Google
 Comment: The LevelDB Authors are listed in src/leveldb/AUTHORS.
 
+License: Apache-2 with LLVM exception
+ ==============================================================================
+ The LLVM Project is under the Apache License v2.0 with LLVM Exceptions:
+ ==============================================================================
+ .
+ On Debian systems, the full text of the Apache License v2.0 can be found in the
+ file `/usr/share/common-licenses/Apache-2.0`.
+ .
+ ---- LLVM Exceptions to the Apache 2.0 License ----
+ .
+ As an exception, if, as a result of your compiling your source code, portions
+ of this Software are embedded into an Object form of such source code, you
+ may redistribute such embedded portions in such Object form without complying
+ with the conditions of Sections 4(a), 4(b) and 4(d) of the License.
+ .
+ In addition, if you combine or link compiled forms of this Software with
+ software that is licensed under the GPLv2 ("Combined Software") and if a
+ court of competent jurisdiction determines that the patent provision (Section
+ 3), the indemnity provision (Section 9) or other Section of the License
+ conflicts with the conditions of the GPLv2, you may retroactively and
+ prospectively choose to deem waived or otherwise exclude such Section(s) of
+ the License, but only in their entirety and only with respect to the Combined
+ Software.
+
 License: Boost-Software-License-1.0
  Permission is hereby granted, free of charge, to any person or organization
  obtaining a copy of the software and accompanying documentation covered by