diff --git a/config/collector.go b/config/collector.go
index 8e0befa..216774b 100644
--- a/config/collector.go
+++ b/config/collector.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package config
 
 import (
diff --git a/config/config.go b/config/config.go
index 5892313..8bd633e 100644
--- a/config/config.go
+++ b/config/config.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package config
 
 import "github.com/perses/common/config"
diff --git a/database/database.go b/database/database.go
index 5f2fd9c..3ecb3e6 100644
--- a/database/database.go
+++ b/database/database.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package database
 
 import (
diff --git a/main.go b/main.go
index 920334e..854a69b 100644
--- a/main.go
+++ b/main.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package main
 
 import (
diff --git a/pkg/api/v1/metric_usage.go b/pkg/api/v1/metric_usage.go
index 14cfe98..0a6882b 100644
--- a/pkg/api/v1/metric_usage.go
+++ b/pkg/api/v1/metric_usage.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package v1
 
 type RuleUsage struct {
diff --git a/pkg/client/client.go b/pkg/client/client.go
index 9d9b9be..ba5169b 100644
--- a/pkg/client/client.go
+++ b/pkg/client/client.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package client
 
 import (
diff --git a/source/grafana/grafana.go b/source/grafana/grafana.go
index 4d851e0..9bd091f 100644
--- a/source/grafana/grafana.go
+++ b/source/grafana/grafana.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package grafana
 
 import (
diff --git a/source/grafana/model.go b/source/grafana/model.go
index a809903..6ed6805 100644
--- a/source/grafana/model.go
+++ b/source/grafana/model.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package grafana
 
 type target struct {
diff --git a/source/metric/endpoint.go b/source/metric/endpoint.go
index 060d5b9..0a50ed3 100644
--- a/source/metric/endpoint.go
+++ b/source/metric/endpoint.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package metric
 
 import (
diff --git a/source/metric/metric.go b/source/metric/metric.go
index 4c1df77..9129164 100644
--- a/source/metric/metric.go
+++ b/source/metric/metric.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package metric
 
 import (
diff --git a/source/perses/perses.go b/source/perses/perses.go
index adcc59f..de21138 100644
--- a/source/perses/perses.go
+++ b/source/perses/perses.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package perses
 
 import (
diff --git a/source/rules/endpoint.go b/source/rules/endpoint.go
index ef55f1e..3d22613 100644
--- a/source/rules/endpoint.go
+++ b/source/rules/endpoint.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package rules
 
 import (
diff --git a/source/rules/rules.go b/source/rules/rules.go
index 18f600e..a5cc4c1 100644
--- a/source/rules/rules.go
+++ b/source/rules/rules.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package rules
 
 import (
diff --git a/utils/array.go b/utils/array.go
index f10db1b..37f011b 100644
--- a/utils/array.go
+++ b/utils/array.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package utils
 
 func InsertIfNotPresent[T comparable](slice []T, item T) []T {
diff --git a/utils/prometheus/prometheus.go b/utils/prometheus/prometheus.go
index 3558dcc..037dbe3 100644
--- a/utils/prometheus/prometheus.go
+++ b/utils/prometheus/prometheus.go
@@ -1,3 +1,16 @@
+// Copyright 2024 The Perses Authors
+// 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.
+
 package prometheus
 
 import (