diff --git a/debian/apertis/copyright b/debian/apertis/copyright
new file mode 100644
index 0000000000000000000000000000000000000000..6c3b95a9e0e8cec204025a8ff7ecc7bf8a913bac
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+++ b/debian/apertis/copyright
@@ -0,0 +1,71 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+
+Files: *
+Copyright: WHATWG (Apple, Google, Mozilla, Microsoft).
+ Mozilla Foundation.
+ Mozilla Foundation
+ Henri Sivonen <hsivonen@hsivonen.fi>
+License: (Apache-2.0 or Expat) and BSD-3-Clause or Apache-2.0 or BSD-3-clause or Expat~unspecified or Apache-2.0 or Expat or BSD-3-clause
+
+Files: COPYRIGHT
+Copyright: Mozilla Foundation.
+License: Apache-2.0 or BSD-3-clause or Expat~unspecified
+
+Files: Cargo.toml
+Copyright: Henri Sivonen <hsivonen@hsivonen.fi>
+License: (Apache-2.0 or Expat) and BSD-3-Clause
+
+Files: LICENSE-APACHE
+Copyright: no-info-found
+License: Apache-2.0
+
+Files: LICENSE-MIT
+Copyright: Mozilla Foundation
+License: Expat
+
+Files: LICENSE-WHATWG
+Copyright: WHATWG (Apple, Google, Mozilla, Microsoft).
+License: BSD-3-clause
+
+Files: generate-encoding-data.py
+Copyright: Mozilla Foundation. See the COPYRIGHT
+License: Apache-2.0 or Expat~unspecified
+
+Files: src/*
+Copyright: Mozilla Foundation. See the COPYRIGHT
+License: Apache-2.0 or Expat~unspecified
+
+Files: src/data.rs
+ src/lib.rs
+Copyright: Mozilla Foundation. See the COPYRIGHT
+License: Apache-2.0 or BSD-3-clause or Expat~unspecified
+
+Files: src/gb18030_2022.rs
+Copyright: WHATWG (Apple, Google, Mozilla, Microsoft).
+License: BSD-3-clause
+
+Files: src/test_data/*
+Copyright: no-info-found
+License: BSD-3-Clause
+
+Files: src/test_data/big5_in_ref.txt
+ src/test_data/big5_out.txt
+Copyright: no-info-found
+License: BSD-3-Clause
+
+Files: src/test_data/euc_kr_in_ref.txt
+ src/test_data/euc_kr_out.txt
+Copyright: no-info-found
+License: BSD-3-Clause
+
+Files: src/test_data/iso_2022_jp_in_ref.txt
+ src/test_data/iso_2022_jp_out.txt
+ src/test_data/jis0208_in_ref.txt
+ src/test_data/jis0208_out.txt
+ src/test_data/shift_jis_out.txt
+Copyright: no-info-found
+License: BSD-3-Clause
+
+Files: src/test_data/jis0212_in_ref.txt
+Copyright: no-info-found
+License: BSD-3-Clause