diff --git a/src/all.rs b/src/all.rs
index f7949fb..94a8c5c 100644
--- a/src/all.rs
+++ b/src/all.rs
@@ -1,3 +1,17 @@
+// Copyright 2020-2021, The Tremor Team
+//
+// 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.
+
 use crate::opentelemetry::proto::collector::logs::v1 as logs_base;
 use crate::opentelemetry::proto::collector::metrics::v1 as metrics_base;
 use crate::opentelemetry::proto::collector::trace::v1 as trace_base;
diff --git a/src/all/channels.rs b/src/all/channels.rs
index 152d8d3..4c97fb6 100644
--- a/src/all/channels.rs
+++ b/src/all/channels.rs
@@ -1,3 +1,17 @@
+// Copyright 2020-2021, The Tremor Team
+//
+// 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.
+
 use crate::opentelemetry::proto::collector::logs::v1 as logs_base;
 use crate::opentelemetry::proto::collector::metrics::v1 as metrics_base;
 use crate::opentelemetry::proto::collector::trace::v1 as trace_base;
diff --git a/src/logs.rs b/src/logs.rs
index d2ef2b4..689d4fe 100644
--- a/src/logs.rs
+++ b/src/logs.rs
@@ -1,3 +1,17 @@
+// Copyright 2020-2021, The Tremor Team
+//
+// 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.
+
 use crate::opentelemetry::proto::collector::logs::v1 as base;
 use crate::opentelemetry::proto::collector::logs::v1::logs_service_server as skel;
 
diff --git a/src/logs/channels.rs b/src/logs/channels.rs
index ccc9a66..d4919f3 100644
--- a/src/logs/channels.rs
+++ b/src/logs/channels.rs
@@ -1,3 +1,17 @@
+// Copyright 2020-2021, The Tremor Team
+//
+// 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.
+
 use crate::opentelemetry::proto::collector::logs::v1 as base;
 use crate::opentelemetry::proto::collector::logs::v1::logs_service_server as skel;
 use tokio::sync::mpsc::{Receiver, Sender};
diff --git a/src/metrics.rs b/src/metrics.rs
index fa77d20..90bae90 100644
--- a/src/metrics.rs
+++ b/src/metrics.rs
@@ -1,3 +1,17 @@
+// Copyright 2020-2021, The Tremor Team
+//
+// 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.
+
 use crate::opentelemetry::proto::collector::metrics::v1 as base;
 use crate::opentelemetry::proto::collector::metrics::v1::metrics_service_server as skel;
 
diff --git a/src/metrics/channels.rs b/src/metrics/channels.rs
index 19b5ff4..695bfed 100644
--- a/src/metrics/channels.rs
+++ b/src/metrics/channels.rs
@@ -1,3 +1,17 @@
+// Copyright 2020-2021, The Tremor Team
+//
+// 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.
+
 use crate::opentelemetry::proto::collector::metrics::v1 as base;
 use crate::opentelemetry::proto::collector::metrics::v1::metrics_service_server as skel;
 use tokio::sync::mpsc::{Receiver, Sender};
diff --git a/src/trace.rs b/src/trace.rs
index cc3b07f..1226f71 100644
--- a/src/trace.rs
+++ b/src/trace.rs
@@ -1,3 +1,17 @@
+// Copyright 2020-2021, The Tremor Team
+//
+// 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.
+
 use crate::opentelemetry::proto::collector::trace::v1 as base;
 use crate::opentelemetry::proto::collector::trace::v1::trace_service_server as skel;