diff --git a/doc.go b/doc.go
index 95c27f2..aa164e3 100644
--- a/doc.go
+++ b/doc.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 // aws-cloudformation-resource-schema-sdk-go handles CloudFormation Resource Providers Schema functionality in Go.
 //
 // This includes, but is not limited to, wrapping JSON Schema library usage,
diff --git a/handler.go b/handler.go
index 72588c8..aa8b796 100644
--- a/handler.go
+++ b/handler.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 const (
diff --git a/json_schema.go b/json_schema.go
index ce7944a..1c01c9a 100644
--- a/json_schema.go
+++ b/json_schema.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 import (
diff --git a/meta_json_schema.go b/meta_json_schema.go
index aa79574..e1c47fd 100644
--- a/meta_json_schema.go
+++ b/meta_json_schema.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 // MetaJsonSchema represents the meta-schema for resource schemas
diff --git a/meta_json_schema_test.go b/meta_json_schema_test.go
index 6fa5c3d..a4ea2aa 100644
--- a/meta_json_schema_test.go
+++ b/meta_json_schema_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema_test
 
 import (
diff --git a/property.go b/property.go
index bef5fa0..6424632 100644
--- a/property.go
+++ b/property.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 import (
diff --git a/property_json_pointer.go b/property_json_pointer.go
index 827d6c2..cd6e239 100644
--- a/property_json_pointer.go
+++ b/property_json_pointer.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 import "strings"
diff --git a/property_json_pointer_test.go b/property_json_pointer_test.go
index 6f4204a..d3f2660 100644
--- a/property_json_pointer_test.go
+++ b/property_json_pointer_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema_test
 
 import (
diff --git a/property_json_pointers.go b/property_json_pointers.go
index 76c84da..3b477eb 100644
--- a/property_json_pointers.go
+++ b/property_json_pointers.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 // PropertyJsonPointers is a list of PropertyJsonPointer.
diff --git a/property_subschema.go b/property_subschema.go
index 44e0f37..7a09e1b 100644
--- a/property_subschema.go
+++ b/property_subschema.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 type PropertySubschema struct {
diff --git a/property_subschema_test.go b/property_subschema_test.go
index 4c545e6..28950e5 100644
--- a/property_subschema_test.go
+++ b/property_subschema_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema_test
 
 import (
diff --git a/property_test.go b/property_test.go
index 413115f..a396b6b 100644
--- a/property_test.go
+++ b/property_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema_test
 
 import (
diff --git a/property_transform.go b/property_transform.go
index 6ae9383..1032fca 100644
--- a/property_transform.go
+++ b/property_transform.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 import (
diff --git a/property_transform_test.go b/property_transform_test.go
index 455ac8e..34b0e66 100644
--- a/property_transform_test.go
+++ b/property_transform_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema_test
 
 import (
diff --git a/reference.go b/reference.go
index da33f07..151ea69 100644
--- a/reference.go
+++ b/reference.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 import (
diff --git a/reference_test.go b/reference_test.go
index ce83b7b..3e13b5e 100644
--- a/reference_test.go
+++ b/reference_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema_test
 
 import (
diff --git a/replacement_strategy.go b/replacement_strategy.go
index f295a46..5b0df81 100644
--- a/replacement_strategy.go
+++ b/replacement_strategy.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 const (
diff --git a/resource.go b/resource.go
index e16fa33..9859967 100644
--- a/resource.go
+++ b/resource.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 import (
diff --git a/resource_expand.go b/resource_expand.go
index 763c806..992b46e 100644
--- a/resource_expand.go
+++ b/resource_expand.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 import (
diff --git a/resource_expand_test.go b/resource_expand_test.go
index fcc88f2..4c5a282 100644
--- a/resource_expand_test.go
+++ b/resource_expand_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema_test
 
 import (
diff --git a/resource_json_schema.go b/resource_json_schema.go
index af65650..0f4091d 100644
--- a/resource_json_schema.go
+++ b/resource_json_schema.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 import (
diff --git a/resource_json_schema_test.go b/resource_json_schema_test.go
index dad95cd..990f933 100644
--- a/resource_json_schema_test.go
+++ b/resource_json_schema_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema_test
 
 import (
diff --git a/resource_link.go b/resource_link.go
index a53bdef..b94a913 100644
--- a/resource_link.go
+++ b/resource_link.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 type ResourceLink struct {
diff --git a/resource_test.go b/resource_test.go
index 53210df..d6db5f8 100644
--- a/resource_test.go
+++ b/resource_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema_test
 
 import (
diff --git a/sanitize.go b/sanitize.go
index baead2e..ba67114 100644
--- a/sanitize.go
+++ b/sanitize.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 import (
diff --git a/sanitize_test.go b/sanitize_test.go
index 39f6b4d..359e54d 100644
--- a/sanitize_test.go
+++ b/sanitize_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema_test
 
 import (
diff --git a/tagging.go b/tagging.go
index e71f91b..ef981c4 100644
--- a/tagging.go
+++ b/tagging.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 type Tagging struct {
diff --git a/type.go b/type.go
index 924fe1f..44d2f18 100644
--- a/type.go
+++ b/type.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package cfschema
 
 import (