diff --git a/BUILD.bazel b/BUILD.bazel
index 0a72b67..9a22d46 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -1,3 +1,5 @@
+# Copyright 2019 OpenAPI-Generator-Bazel Contributors
+
 load("@bazel_tools//tools/build_defs/pkg:pkg.bzl", "pkg_tar")
 
 package(default_visibility = ["//visibility:public"])
diff --git a/WORKSPACE b/WORKSPACE
index 8abc8c1..2bbdfb3 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -1,3 +1,5 @@
+# Copyright 2019 OpenAPI-Generator-Bazel Contributors
+
 workspace(name = "openapi_tools_generator_bazel")
 
 load("//:defs.bzl", "openapi_tools_generator_bazel_repositories")
diff --git a/defs.bzl b/defs.bzl
index 8439975..975b6c6 100644
--- a/defs.bzl
+++ b/defs.bzl
@@ -1,3 +1,5 @@
+# Copyright 2019 OpenAPI-Generator-Bazel Contributors
+
 load(
     "//internal:openapi_generator.bzl",
     _openapi_generator = "openapi_generator",
diff --git a/internal/BUILD.bazel b/internal/BUILD.bazel
index d16d68f..df9a01b 100644
--- a/internal/BUILD.bazel
+++ b/internal/BUILD.bazel
@@ -1,3 +1,5 @@
+# Copyright 2019 OpenAPI-Generator-Bazel Contributors
+
 package(default_visibility = ["//visibility:public"])
 
 exports_files([
diff --git a/internal/openapi_generator.bzl b/internal/openapi_generator.bzl
index b1aeb03..ad17321 100644
--- a/internal/openapi_generator.bzl
+++ b/internal/openapi_generator.bzl
@@ -1,3 +1,5 @@
+# Copyright 2019 OpenAPI-Generator-Bazel Contributors
+
 def openapi_tools_generator_bazel_repositories(openapi_generator_cli_version = "4.1.0", prefix = "openapi_tools_generator_bazel"):
     native.maven_jar(
         name = prefix + "_cli",
diff --git a/internal/test/BUILD.bazel b/internal/test/BUILD.bazel
index cd3b825..3c3f225 100644
--- a/internal/test/BUILD.bazel
+++ b/internal/test/BUILD.bazel
@@ -1,3 +1,5 @@
+# Copyright 2019 OpenAPI-Generator-Bazel Contributors
+
 load("@openapi_tools_generator_bazel//:defs.bzl", "openapi_generator")
 
 openapi_generator(
diff --git a/internal/test/petstore.yaml b/internal/test/petstore.yaml
index 8d9872b..017e0d2 100644
--- a/internal/test/petstore.yaml
+++ b/internal/test/petstore.yaml
@@ -1,3 +1,5 @@
+# Copyright 2019 OpenAPI-Generator-Bazel Contributors
+
 swagger: "2.0"
 info:
   version: 1.0.0