diff --git a/django_migration_linter/__init__.py b/django_migration_linter/__init__.py
index 4060d62..7230d42 100644
--- a/django_migration_linter/__init__.py
+++ b/django_migration_linter/__init__.py
@@ -1,16 +1,2 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 from .migration_linter import *  # noqa
 from .operations import *  # noqa
diff --git a/django_migration_linter/cache.py b/django_migration_linter/cache.py
index e85b072..be744df 100644
--- a/django_migration_linter/cache.py
+++ b/django_migration_linter/cache.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 import os
 import pickle
 
diff --git a/django_migration_linter/constants.py b/django_migration_linter/constants.py
index b008642..35c4bdd 100644
--- a/django_migration_linter/constants.py
+++ b/django_migration_linter/constants.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 from appdirs import user_cache_dir
 
 __version__ = "1.4.1"
diff --git a/django_migration_linter/migration_linter.py b/django_migration_linter/migration_linter.py
index a3b4678..561e60c 100644
--- a/django_migration_linter/migration_linter.py
+++ b/django_migration_linter/migration_linter.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 from __future__ import print_function
 
 import hashlib
diff --git a/django_migration_linter/operations.py b/django_migration_linter/operations.py
index 3182a8b..7265720 100644
--- a/django_migration_linter/operations.py
+++ b/django_migration_linter/operations.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 from django.db.migrations.operations.base import Operation
 
 
diff --git a/django_migration_linter/sql_analyser/__init__.py b/django_migration_linter/sql_analyser/__init__.py
index 21ff668..109432f 100644
--- a/django_migration_linter/sql_analyser/__init__.py
+++ b/django_migration_linter/sql_analyser/__init__.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 from .base import BaseAnalyser  # noqa
 from .mysql import MySqlAnalyser  # noqa
 from .postgresql import PostgresqlAnalyser  # noqa
diff --git a/django_migration_linter/sql_analyser/analyser.py b/django_migration_linter/sql_analyser/analyser.py
index 7b81317..1c2bd7b 100644
--- a/django_migration_linter/sql_analyser/analyser.py
+++ b/django_migration_linter/sql_analyser/analyser.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 import logging
 
 from django_migration_linter.sql_analyser import (
diff --git a/django_migration_linter/sql_analyser/base.py b/django_migration_linter/sql_analyser/base.py
index abe2827..10c3e94 100644
--- a/django_migration_linter/sql_analyser/base.py
+++ b/django_migration_linter/sql_analyser/base.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 import logging
 import re
 
diff --git a/django_migration_linter/sql_analyser/mysql.py b/django_migration_linter/sql_analyser/mysql.py
index 6adeb0a..4178c32 100644
--- a/django_migration_linter/sql_analyser/mysql.py
+++ b/django_migration_linter/sql_analyser/mysql.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 import re
 
 from .base import BaseAnalyser
diff --git a/django_migration_linter/sql_analyser/postgresql.py b/django_migration_linter/sql_analyser/postgresql.py
index fe9a4ec..5da16c2 100644
--- a/django_migration_linter/sql_analyser/postgresql.py
+++ b/django_migration_linter/sql_analyser/postgresql.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 from .base import BaseAnalyser
 
 
diff --git a/django_migration_linter/sql_analyser/sqlite.py b/django_migration_linter/sql_analyser/sqlite.py
index 826896b..516952f 100644
--- a/django_migration_linter/sql_analyser/sqlite.py
+++ b/django_migration_linter/sql_analyser/sqlite.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 import re
 
 from .base import BaseAnalyser
diff --git a/django_migration_linter/sql_analyser/utils.py b/django_migration_linter/sql_analyser/utils.py
index 155f372..e7e6c2c 100644
--- a/django_migration_linter/sql_analyser/utils.py
+++ b/django_migration_linter/sql_analyser/utils.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 from copy import deepcopy
 
 
diff --git a/django_migration_linter/utils.py b/django_migration_linter/utils.py
index 34a6a17..2dad70a 100644
--- a/django_migration_linter/utils.py
+++ b/django_migration_linter/utils.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 from __future__ import print_function
 
 import os
diff --git a/setup.py b/setup.py
index 79dad77..df17e74 100644
--- a/setup.py
+++ b/setup.py
@@ -1,16 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
 import ast
 import re
 from os import path
diff --git a/tests/fixtures.py b/tests/fixtures.py
index cb0c27e..585bfb1 100644
--- a/tests/fixtures.py
+++ b/tests/fixtures.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 CREATE_TABLE_WITH_NOT_NULL_COLUMN = "app_create_table_with_not_null_column"
 ADD_NOT_NULL_COLUMN = "app_add_not_null_column"
 DROP_COLUMN = "app_drop_column"
diff --git a/tests/functional/test_cache.py b/tests/functional/test_cache.py
index fe4160d..e4d3076 100644
--- a/tests/functional/test_cache.py
+++ b/tests/functional/test_cache.py
@@ -1,16 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
 import os
 import sys
 import unittest
diff --git a/tests/functional/test_migration_linter.py b/tests/functional/test_migration_linter.py
index 17066f2..a3f30b4 100644
--- a/tests/functional/test_migration_linter.py
+++ b/tests/functional/test_migration_linter.py
@@ -1,16 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
 import os
 import unittest
 
diff --git a/tests/unit/test_linter.py b/tests/unit/test_linter.py
index 4e6302d..392a43c 100644
--- a/tests/unit/test_linter.py
+++ b/tests/unit/test_linter.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 import unittest
 import tempfile
 
diff --git a/tests/unit/test_sql_analyser.py b/tests/unit/test_sql_analyser.py
index 9995f85..23b1f17 100644
--- a/tests/unit/test_sql_analyser.py
+++ b/tests/unit/test_sql_analyser.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 import unittest
 
 from django_migration_linter.sql_analyser import analyse_sql_statements
diff --git a/tests/unit/test_utils.py b/tests/unit/test_utils.py
index 1be4aa9..700b637 100644
--- a/tests/unit/test_utils.py
+++ b/tests/unit/test_utils.py
@@ -1,17 +1,3 @@
-# Copyright 2019 3YOURMIND GmbH
-
-# Licensed 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.
-
 import unittest
 
 from django_migration_linter.utils import split_path, split_migration_path