diff --git a/README.rst b/README.rst
index 3a78aac..61f8e32 100644
--- a/README.rst
+++ b/README.rst
@@ -47,3 +47,20 @@ License
 Synthale is released under the GPLv3_ license.
 
 .. _GPLv3: LICENSE
+
+::
+
+  Copyright (C) 2019 Mike Shoup
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU Affero 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 Affero General Public License for more details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/src/synthale/cli.py b/src/synthale/cli.py
index 4b41418..38cb9ea 100644
--- a/src/synthale/cli.py
+++ b/src/synthale/cli.py
@@ -1,5 +1,20 @@
 """Contains the commands for the CLI interface."""
 
+# Copyright (C) 2019 Mike Shoup
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 import click
 
 from synthale.recipes import load_file, load_all_files, write_recipes
diff --git a/src/synthale/convert.py b/src/synthale/convert.py
index 05b8ed7..13961ac 100644
--- a/src/synthale/convert.py
+++ b/src/synthale/convert.py
@@ -5,6 +5,21 @@ units are the defaults used in the BeerXML format, and as a result, in
 `pybeerxml`.
 """
 
+# Copyright (C) 2019 Mike Shoup
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 
 def liters(liters, format_spec=''):
     """Return a string with the unit appended.
diff --git a/src/synthale/markdown.py b/src/synthale/markdown.py
index 0348dfa..7513c46 100644
--- a/src/synthale/markdown.py
+++ b/src/synthale/markdown.py
@@ -1,5 +1,20 @@
 """This module contains functions to generate markdown elements."""
 
+# Copyright (C) 2019 Mike Shoup
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 import re
 
 
diff --git a/src/synthale/recipes.py b/src/synthale/recipes.py
index 86d5ee7..39fc47b 100644
--- a/src/synthale/recipes.py
+++ b/src/synthale/recipes.py
@@ -1,5 +1,20 @@
 """Use this module to parse BeerXML files."""
 
+# Copyright (C) 2019 Mike Shoup
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import re
 import sys
diff --git a/tests/conftest.py b/tests/conftest.py
index 974e0ee..f7aa05b 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,5 +1,20 @@
 """Contains fixtures used during tests."""
 
+# Copyright (C) 2019 Mike Shoup
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 import pytest
 import pybeerxml
 
diff --git a/tests/test_cli.py b/tests/test_cli.py
index e37c39b..ad7c13d 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1,5 +1,20 @@
 """Test interactions with the CLI."""
 
+# Copyright (C) 2019 Mike Shoup
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 from click.testing import CliRunner
 
 from synthale.cli import main
diff --git a/tests/test_convert.py b/tests/test_convert.py
index 41394bd..9e457db 100644
--- a/tests/test_convert.py
+++ b/tests/test_convert.py
@@ -1,5 +1,20 @@
 """Contains tests for the synthale.convert module."""
 
+# Copyright (C) 2019 Mike Shoup
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 from synthale import convert
 
 
diff --git a/tests/test_markdown.py b/tests/test_markdown.py
index f8ba151..610f7c7 100644
--- a/tests/test_markdown.py
+++ b/tests/test_markdown.py
@@ -1,4 +1,20 @@
 """Contains tests for the synthale.markdown module."""
+
+# Copyright (C) 2019 Mike Shoup
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 import pytest
 
 from synthale import markdown
diff --git a/tests/test_recipes.py b/tests/test_recipes.py
index 1f0e608..151895d 100644
--- a/tests/test_recipes.py
+++ b/tests/test_recipes.py
@@ -1,5 +1,20 @@
 """Contains tests for the synthale.recipes module."""
 
+# Copyright (C) 2019 Mike Shoup
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 import pybeerxml
 
 from synthale.recipes import (