diff --git a/BUILD b/BUILD
index 8d7c5b91..69c9bdae 100644
--- a/BUILD
+++ b/BUILD
@@ -1,3 +1,17 @@
+# Copyright 2022 Google LLC
+#
+# 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.
+
 load("@rules_cc//cc:defs.bzl", "cc_library")
 load(
     "@proxy_wasm_cpp_host//bazel:select.bzl",
diff --git a/bazel/BUILD b/bazel/BUILD
index 39f25a63..4a83aa44 100644
--- a/bazel/BUILD
+++ b/bazel/BUILD
@@ -1,3 +1,17 @@
+# Copyright 2022 Google LLC
+#
+# 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.
+
 load("@bazel_skylib//lib:selects.bzl", "selects")
 
 package(default_visibility = ["//visibility:public"])
diff --git a/bazel/external/BUILD b/bazel/external/BUILD
index e69de29b..6d6d1266 100644
--- a/bazel/external/BUILD
+++ b/bazel/external/BUILD
@@ -0,0 +1,13 @@
+# Copyright 2022 Google LLC
+#
+# 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.
diff --git a/test/BUILD b/test/BUILD
index aa99c0f3..a922bbfb 100644
--- a/test/BUILD
+++ b/test/BUILD
@@ -1,3 +1,17 @@
+# Copyright 2022 Google LLC
+#
+# 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.
+
 load("@proxy_wasm_cpp_host//bazel:select.bzl", "proxy_wasm_select_engine_null")
 load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
 
diff --git a/test/fuzz/BUILD b/test/fuzz/BUILD
index 4c069bcf..71b09900 100644
--- a/test/fuzz/BUILD
+++ b/test/fuzz/BUILD
@@ -1,3 +1,17 @@
+# Copyright 2022 Google LLC
+#
+# 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.
+
 load("@rules_fuzzing//fuzzing:cc_defs.bzl", "cc_fuzz_test")
 
 licenses(["notice"])  # Apache 2
diff --git a/test/test_data/BUILD b/test/test_data/BUILD
index 38612ca1..d730b4bf 100644
--- a/test/test_data/BUILD
+++ b/test/test_data/BUILD
@@ -1,3 +1,17 @@
+# Copyright 2022 Google LLC
+#
+# 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.
+
 load("@proxy_wasm_cpp_host//bazel:wasm.bzl", "wasm_rust_binary")
 load("@proxy_wasm_cpp_sdk//bazel:defs.bzl", "proxy_wasm_cc_binary")