diff --git a/focker/__init__.py b/focker/__init__.py
index e69de29..15a470e 100644
--- a/focker/__init__.py
+++ b/focker/__init__.py
@@ -0,0 +1,6 @@
+#
+# Copyright (C) Stanislaw Adaszewski, 2020
+# License: GNU General Public License v3.0
+# URL: https://github.com/sadaszewski/focker
+# URL: https://adared.ch/focker
+#
diff --git a/focker/compose.py b/focker/compose.py
index 5439907..058b631 100644
--- a/focker/compose.py
+++ b/focker/compose.py
@@ -1,3 +1,10 @@
+#
+# Copyright (C) Stanislaw Adaszewski, 2020
+# License: GNU General Public License v3.0
+# URL: https://github.com/sadaszewski/focker
+# URL: https://adared.ch/focker
+#
+
 import os
 import yaml
 from .zfs import AmbiguousValueError, \
diff --git a/focker/focker.py b/focker/focker.py
index 00c7cee..2f27a6f 100644
--- a/focker/focker.py
+++ b/focker/focker.py
@@ -1,3 +1,10 @@
+#
+# Copyright (C) Stanislaw Adaszewski, 2020
+# License: GNU General Public License v3.0
+# URL: https://github.com/sadaszewski/focker
+# URL: https://adared.ch/focker
+#
+
 from argparse import ArgumentParser
 import argparse
 import yaml
diff --git a/focker/image.py b/focker/image.py
index 49dd95b..cd3b78a 100644
--- a/focker/image.py
+++ b/focker/image.py
@@ -1,3 +1,10 @@
+#
+# Copyright (C) Stanislaw Adaszewski, 2020
+# License: GNU General Public License v3.0
+# URL: https://github.com/sadaszewski/focker
+# URL: https://adared.ch/focker
+#
+
 from .zfs import *
 import os
 import yaml
diff --git a/focker/jail.py b/focker/jail.py
index eedc2f5..f27ec85 100644
--- a/focker/jail.py
+++ b/focker/jail.py
@@ -1,3 +1,10 @@
+#
+# Copyright (C) Stanislaw Adaszewski, 2020
+# License: GNU General Public License v3.0
+# URL: https://github.com/sadaszewski/focker
+# URL: https://adared.ch/focker
+#
+
 import subprocess
 from .zfs import *
 import random
diff --git a/focker/misc.py b/focker/misc.py
index d3fbc3b..b6f837a 100644
--- a/focker/misc.py
+++ b/focker/misc.py
@@ -1,3 +1,10 @@
+#
+# Copyright (C) Stanislaw Adaszewski, 2020
+# License: GNU General Public License v3.0
+# URL: https://github.com/sadaszewski/focker
+# URL: https://adared.ch/focker
+#
+
 import random
 from .zfs import zfs_exists
 
diff --git a/focker/mount.py b/focker/mount.py
index a17ac66..64dbd93 100644
--- a/focker/mount.py
+++ b/focker/mount.py
@@ -1,3 +1,10 @@
+#
+# Copyright (C) Stanislaw Adaszewski, 2020
+# License: GNU General Public License v3.0
+# URL: https://github.com/sadaszewski/focker
+# URL: https://adared.ch/focker
+#
+
 from ctypes import Structure, \
     c_uint32, \
     c_uint64, \
diff --git a/focker/snapshot.py b/focker/snapshot.py
index 94856ca..65b4358 100644
--- a/focker/snapshot.py
+++ b/focker/snapshot.py
@@ -1,3 +1,10 @@
+#
+# Copyright (C) Stanislaw Adaszewski, 2020
+# License: GNU General Public License v3.0
+# URL: https://github.com/sadaszewski/focker
+# URL: https://adared.ch/focker
+#
+
 from .zfs import *
 
 
diff --git a/focker/steps.py b/focker/steps.py
index dae7ca2..cf3f77f 100644
--- a/focker/steps.py
+++ b/focker/steps.py
@@ -1,3 +1,10 @@
+#
+# Copyright (C) Stanislaw Adaszewski, 2020
+# License: GNU General Public License v3.0
+# URL: https://github.com/sadaszewski/focker
+# URL: https://adared.ch/focker
+#
+
 import hashlib
 import json
 from .jail import jail_run
diff --git a/focker/volume.py b/focker/volume.py
index f508a11..789c1dd 100644
--- a/focker/volume.py
+++ b/focker/volume.py
@@ -1,3 +1,10 @@
+#
+# Copyright (C) Stanislaw Adaszewski, 2020
+# License: GNU General Public License v3.0
+# URL: https://github.com/sadaszewski/focker
+# URL: https://adared.ch/focker
+#
+
 from .misc import random_sha256_hexdigest
 from .zfs import *
 from tabulate import tabulate
diff --git a/focker/zfs.py b/focker/zfs.py
index a20747a..24e1892 100644
--- a/focker/zfs.py
+++ b/focker/zfs.py
@@ -1,3 +1,10 @@
+#
+# Copyright (C) Stanislaw Adaszewski, 2020
+# License: GNU General Public License v3.0
+# URL: https://github.com/sadaszewski/focker
+# URL: https://adared.ch/focker
+#
+
 import subprocess
 import csv
 import io