diff --git a/Makefile b/Makefile
index be13db3d..e02b663a 100644
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,10 @@ lint:
 	go get -u golang.org/x/lint/golint
 	go list ./... | xargs -n 1 golint -set_exit_status
 
+licenser:
+	go get -u github.com/elastic/go-licenser
+	go-licenser -license Elastic
+
 gomod:
 	go mod tidy
 
@@ -16,4 +20,4 @@ check-git-clean:
 	git update-index --really-refresh
 	git diff-index --quiet HEAD
 
-check: build format lint gomod check-git-clean
+check: build format lint licenser gomod check-git-clean
diff --git a/cmd/build.go b/cmd/build.go
index e1c95000..2f340f94 100644
--- a/cmd/build.go
+++ b/cmd/build.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package cmd
 
 import (
diff --git a/cmd/check.go b/cmd/check.go
index 5c925f3b..56b7d335 100644
--- a/cmd/check.go
+++ b/cmd/check.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package cmd
 
 import (
diff --git a/cmd/format.go b/cmd/format.go
index ad8c7b22..eb93273a 100644
--- a/cmd/format.go
+++ b/cmd/format.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package cmd
 
 import (
diff --git a/cmd/lint.go b/cmd/lint.go
index 302292bc..87f44e7e 100644
--- a/cmd/lint.go
+++ b/cmd/lint.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package cmd
 
 import (
diff --git a/cmd/promote.go b/cmd/promote.go
index 3222674b..446c5a7f 100644
--- a/cmd/promote.go
+++ b/cmd/promote.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package cmd
 
 import (
diff --git a/cmd/root.go b/cmd/root.go
index 01ecdbc3..84ed8858 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package cmd
 
 import (
diff --git a/cmd/stack.go b/cmd/stack.go
index 5b910cd6..bce0dabf 100644
--- a/cmd/stack.go
+++ b/cmd/stack.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package cmd
 
 import (
diff --git a/cmd/testrunner.go b/cmd/testrunner.go
index a284c2e3..8452bf21 100644
--- a/cmd/testrunner.go
+++ b/cmd/testrunner.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package cmd
 
 import (
diff --git a/cmd/version.go b/cmd/version.go
index ee918e54..166c53ed 100644
--- a/cmd/version.go
+++ b/cmd/version.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package cmd
 
 import (
diff --git a/internal/builder/dashboards.go b/internal/builder/dashboards.go
index 81502f46..eb599b87 100644
--- a/internal/builder/dashboards.go
+++ b/internal/builder/dashboards.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package builder
 
 import (
diff --git a/internal/builder/mapstr.go b/internal/builder/mapstr.go
index 32ab5cdc..2a529b83 100644
--- a/internal/builder/mapstr.go
+++ b/internal/builder/mapstr.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package builder
 
 // WARNING: This code is copied from https://github.com/elastic/beats/blob/master/libbeat/common/mapstr.go
diff --git a/internal/builder/packages.go b/internal/builder/packages.go
index 47bb563e..a859262d 100644
--- a/internal/builder/packages.go
+++ b/internal/builder/packages.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package builder
 
 import (
diff --git a/internal/cobraext/command_action.go b/internal/cobraext/command_action.go
index c798226d..46f20afa 100644
--- a/internal/cobraext/command_action.go
+++ b/internal/cobraext/command_action.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package cobraext
 
 import (
diff --git a/internal/cobraext/command_flag.go b/internal/cobraext/command_flag.go
index cdafe7ec..52c29c46 100644
--- a/internal/cobraext/command_flag.go
+++ b/internal/cobraext/command_flag.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package cobraext
 
 import "github.com/pkg/errors"
diff --git a/internal/cobraext/const.go b/internal/cobraext/const.go
index 63a3b455..304b5132 100644
--- a/internal/cobraext/const.go
+++ b/internal/cobraext/const.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package cobraext
 
 // Flag names and descriptions used by CLI commands.
diff --git a/internal/elasticsearch/client.go b/internal/elasticsearch/client.go
index c921c303..ca061f02 100644
--- a/internal/elasticsearch/client.go
+++ b/internal/elasticsearch/client.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package elasticsearch
 
 import (
diff --git a/internal/files/clear.go b/internal/files/clear.go
index 8a8216ab..feaf781b 100644
--- a/internal/files/clear.go
+++ b/internal/files/clear.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package files
 
 import (
diff --git a/internal/files/copy.go b/internal/files/copy.go
index 84e3603b..3cb5249f 100644
--- a/internal/files/copy.go
+++ b/internal/files/copy.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package files
 
 import (
diff --git a/internal/formatter/formatter.go b/internal/formatter/formatter.go
index 3859688e..a074f2b0 100644
--- a/internal/formatter/formatter.go
+++ b/internal/formatter/formatter.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package formatter
 
 import (
diff --git a/internal/formatter/json_formatter.go b/internal/formatter/json_formatter.go
index c4b9c384..948f9252 100644
--- a/internal/formatter/json_formatter.go
+++ b/internal/formatter/json_formatter.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package formatter
 
 import (
diff --git a/internal/formatter/yaml_formatter.go b/internal/formatter/yaml_formatter.go
index 0962d18e..a33ed2eb 100644
--- a/internal/formatter/yaml_formatter.go
+++ b/internal/formatter/yaml_formatter.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package formatter
 
 import (
diff --git a/internal/github/auth.go b/internal/github/auth.go
index 2cfb33cf..30d874c8 100644
--- a/internal/github/auth.go
+++ b/internal/github/auth.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package github
 
 import (
diff --git a/internal/github/client.go b/internal/github/client.go
index ef566cf0..d66ab4c2 100644
--- a/internal/github/client.go
+++ b/internal/github/client.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package github
 
 import (
diff --git a/internal/install/install.go b/internal/install/install.go
index 967d29a5..2377de30 100644
--- a/internal/install/install.go
+++ b/internal/install/install.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package install
 
 import (
diff --git a/internal/install/static_kibana_config_yml.go b/internal/install/static_kibana_config_yml.go
index 0f845f87..de2bab38 100644
--- a/internal/install/static_kibana_config_yml.go
+++ b/internal/install/static_kibana_config_yml.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package install
 
 const kibanaConfigYml = `  
diff --git a/internal/install/static_package_registry_config_yml.go b/internal/install/static_package_registry_config_yml.go
index f728f5a2..250a450b 100644
--- a/internal/install/static_package_registry_config_yml.go
+++ b/internal/install/static_package_registry_config_yml.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package install
 
 const packageRegistryConfigYml = `package_paths:
diff --git a/internal/install/static_package_registry_dockerfile.go b/internal/install/static_package_registry_dockerfile.go
index c57cd4c4..f9546d28 100644
--- a/internal/install/static_package_registry_dockerfile.go
+++ b/internal/install/static_package_registry_dockerfile.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package install
 
 const packageRegistryDockerfile = `FROM docker.elastic.co/package-registry/distribution:snapshot
diff --git a/internal/install/static_snapshot_yml.go b/internal/install/static_snapshot_yml.go
index 5abf770f..e30be702 100644
--- a/internal/install/static_snapshot_yml.go
+++ b/internal/install/static_snapshot_yml.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package install
 
 const snapshotYml = `version: '2.3'
diff --git a/internal/install/version_file.go b/internal/install/version_file.go
index e82d2def..7723c4e9 100644
--- a/internal/install/version_file.go
+++ b/internal/install/version_file.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package install
 
 import (
diff --git a/internal/logger/logger.go b/internal/logger/logger.go
index be072df5..deabb158 100644
--- a/internal/logger/logger.go
+++ b/internal/logger/logger.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package logger
 
 import (
diff --git a/internal/packages/packages.go b/internal/packages/packages.go
index 79c0d967..6087d5ac 100644
--- a/internal/packages/packages.go
+++ b/internal/packages/packages.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package packages
 
 import (
diff --git a/internal/promote/pull_requests.go b/internal/promote/pull_requests.go
index e0f9e8da..6347e206 100644
--- a/internal/promote/pull_requests.go
+++ b/internal/promote/pull_requests.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package promote
 
 import (
diff --git a/internal/promote/storage.go b/internal/promote/storage.go
index b9b350f6..d488c10a 100644
--- a/internal/promote/storage.go
+++ b/internal/promote/storage.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package promote
 
 import (
diff --git a/internal/stack/boot.go b/internal/stack/boot.go
index ad6c7108..d92b071d 100644
--- a/internal/stack/boot.go
+++ b/internal/stack/boot.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package stack
 
 import (
diff --git a/internal/stack/shellinit.go b/internal/stack/shellinit.go
index a7d399eb..19df8bab 100644
--- a/internal/stack/shellinit.go
+++ b/internal/stack/shellinit.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package stack
 
 import (
diff --git a/internal/stack/version.go b/internal/stack/version.go
index 1db1868a..6bac6bc2 100644
--- a/internal/stack/version.go
+++ b/internal/stack/version.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package stack
 
 const (
diff --git a/internal/testrunner/runners/pipeline/ingest_pipeline.go b/internal/testrunner/runners/pipeline/ingest_pipeline.go
index 77a78e26..cbe0d7ea 100644
--- a/internal/testrunner/runners/pipeline/ingest_pipeline.go
+++ b/internal/testrunner/runners/pipeline/ingest_pipeline.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package pipeline
 
 import (
diff --git a/internal/testrunner/runners/pipeline/runner.go b/internal/testrunner/runners/pipeline/runner.go
index a24a6bd1..912e5017 100644
--- a/internal/testrunner/runners/pipeline/runner.go
+++ b/internal/testrunner/runners/pipeline/runner.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package pipeline
 
 import (
diff --git a/internal/testrunner/runners/pipeline/test_case.go b/internal/testrunner/runners/pipeline/test_case.go
index f2629a9d..f0aeac4c 100644
--- a/internal/testrunner/runners/pipeline/test_case.go
+++ b/internal/testrunner/runners/pipeline/test_case.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package pipeline
 
 import (
diff --git a/internal/testrunner/runners/pipeline/test_config.go b/internal/testrunner/runners/pipeline/test_config.go
index abb68ce3..fbeafc13 100644
--- a/internal/testrunner/runners/pipeline/test_config.go
+++ b/internal/testrunner/runners/pipeline/test_config.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package pipeline
 
 import (
diff --git a/internal/testrunner/runners/pipeline/test_result.go b/internal/testrunner/runners/pipeline/test_result.go
index a7e86c04..1ee883a5 100644
--- a/internal/testrunner/runners/pipeline/test_result.go
+++ b/internal/testrunner/runners/pipeline/test_result.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package pipeline
 
 import (
diff --git a/internal/testrunner/runners/runners.go b/internal/testrunner/runners/runners.go
index b6a02288..4e3534d3 100644
--- a/internal/testrunner/runners/runners.go
+++ b/internal/testrunner/runners/runners.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package runners
 
 import (
diff --git a/internal/testrunner/runners/system/system.go b/internal/testrunner/runners/system/system.go
index a8931341..ea97f17d 100644
--- a/internal/testrunner/runners/system/system.go
+++ b/internal/testrunner/runners/system/system.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package system
 
 import (
diff --git a/internal/testrunner/testrunner.go b/internal/testrunner/testrunner.go
index 3b068bf8..0be239f6 100644
--- a/internal/testrunner/testrunner.go
+++ b/internal/testrunner/testrunner.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package testrunner
 
 import (
diff --git a/internal/version/version.go b/internal/version/version.go
index 62bc59ce..8b53b631 100644
--- a/internal/version/version.go
+++ b/internal/version/version.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package version
 
 import (
diff --git a/main.go b/main.go
index 00fcb9cd..f2895e85 100644
--- a/main.go
+++ b/main.go
@@ -1,3 +1,7 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
 package main
 
 import (