diff --git a/Dockerfile b/Dockerfile
index 881f086..1c4cd97 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,5 @@
+# Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
+
 FROM icinga/icingaweb2-deps
 
 COPY icingaweb2 /usr/share/icingaweb2
diff --git a/README.md b/README.md
index a358534..68daffb 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+<!-- Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+ -->
+
 # Icinga Web 2 - Docker image
 
 This image integrates [Icinga Web 2] into your [Docker] environment.
diff --git a/action-base.Dockerfile b/action-base.Dockerfile
index 7e3011f..5059e55 100644
--- a/action-base.Dockerfile
+++ b/action-base.Dockerfile
@@ -1,3 +1,5 @@
+# Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
+
 FROM buildpack-deps:scm as clone
 SHELL ["/bin/bash", "-exo", "pipefail", "-c"]
 
diff --git a/action-base.list b/action-base.list
index d7d2f36..4851309 100644
--- a/action-base.list
+++ b/action-base.list
@@ -1 +1,3 @@
+# Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
+
 deb [arch=amd64] https://download.docker.com/linux/debian buster stable
diff --git a/action.Dockerfile b/action.Dockerfile
index da65b9b..3de5935 100644
--- a/action.Dockerfile
+++ b/action.Dockerfile
@@ -1,3 +1,5 @@
+# Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
+
 FROM icinga/icingaweb2-builder
 
 COPY action.bash composer.bash Dockerfile get-mods.sh icingaweb2.patch /
diff --git a/action.bash b/action.bash
index 306c309..d1f148c 100755
--- a/action.bash
+++ b/action.bash
@@ -1,4 +1,5 @@
 #!/bin/bash
+# Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
 set -exo pipefail
 
 TARGET=icinga/icingaweb2
diff --git a/action.yml b/action.yml
index 96b72fe..1b062d6 100644
--- a/action.yml
+++ b/action.yml
@@ -1,3 +1,5 @@
+# Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
+
 name: Icinga Web 2 Docker image
 runs:
   using: docker
diff --git a/build.bash b/build.bash
index 15bd021..6042e0e 100755
--- a/build.bash
+++ b/build.bash
@@ -1,4 +1,5 @@
 #!/bin/bash
+# Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
 set -exo pipefail
 
 IW2SRC="$1"
diff --git a/composer.bash b/composer.bash
index 06382b6..d63f314 100755
--- a/composer.bash
+++ b/composer.bash
@@ -1,4 +1,5 @@
 #!/bin/bash
+# Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
 set -exo pipefail
 
 for d in icingaweb2 icingaweb2/modules/*; do
diff --git a/deps.Dockerfile b/deps.Dockerfile
index 0ece8ed..052a02a 100644
--- a/deps.Dockerfile
+++ b/deps.Dockerfile
@@ -1,3 +1,5 @@
+# Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
+
 FROM golang:buster as entrypoint
 
 COPY entrypoint /entrypoint
diff --git a/entrypoint/db-init/application/clicommands/DbCommand.php b/entrypoint/db-init/application/clicommands/DbCommand.php
index 8f631b8..e8967f4 100644
--- a/entrypoint/db-init/application/clicommands/DbCommand.php
+++ b/entrypoint/db-init/application/clicommands/DbCommand.php
@@ -1,4 +1,5 @@
 <?php
+// Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
 
 namespace Icinga\Module\Dockerentrypoint\Clicommands;
 
diff --git a/entrypoint/main.go b/entrypoint/main.go
index 6733301..165040a 100644
--- a/entrypoint/main.go
+++ b/entrypoint/main.go
@@ -1,3 +1,5 @@
+// Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
+
 package main
 
 import (
diff --git a/get-mods.sh b/get-mods.sh
index f1cf4f7..8b8dab8 100755
--- a/get-mods.sh
+++ b/get-mods.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
 set -exo pipefail
 
 BRANCH="$1"
diff --git a/icingaweb2.patch b/icingaweb2.patch
index 6992063..8e1462e 100644
--- a/icingaweb2.patch
+++ b/icingaweb2.patch
@@ -1,3 +1,4 @@
+Icinga Web 2 Docker image | (c) 2020 Icinga GmbH | GPLv2+
 --- application/forms/Config/General/LoggingConfigForm.php
 +++ application/forms/Config/General/LoggingConfigForm.php
 @@ -39,8 +39,8 @@ class LoggingConfigForm extends Form