diff --git a/tools/golangci-lint/main.go b/tools/golangci-lint/main.go
index 2ed8bff5c7..7338157478 100644
--- a/tools/golangci-lint/main.go
+++ b/tools/golangci-lint/main.go
@@ -1,6 +1,23 @@
+/*
+ * Cadence - The resource-oriented smart contract programming language
+ *
+ * Copyright 2019-2021 Dapper Labs, Inc.
+ *
+ * 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 lint
 
 import (
 	_ "github.com/golangci/golangci-lint/pkg/lint"
 )
-
diff --git a/tools/maprangecheck/analyzer.go b/tools/maprangecheck/analyzer.go
index 21444b61db..6df7946042 100644
--- a/tools/maprangecheck/analyzer.go
+++ b/tools/maprangecheck/analyzer.go
@@ -1,3 +1,21 @@
+/*
+ * Cadence - The resource-oriented smart contract programming language
+ *
+ * Copyright 2019-2021 Dapper Labs, Inc.
+ *
+ * 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/tools/maprangecheck/analyzer_test.go b/tools/maprangecheck/analyzer_test.go
index 003a76f9b4..40f80930f8 100644
--- a/tools/maprangecheck/analyzer_test.go
+++ b/tools/maprangecheck/analyzer_test.go
@@ -1,3 +1,21 @@
+/*
+ * Cadence - The resource-oriented smart contract programming language
+ *
+ * Copyright 2019-2021 Dapper Labs, Inc.
+ *
+ * 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/tools/maprangecheck/main.go b/tools/maprangecheck/main.go
index e42b6fc7fd..638da6c7ed 100644
--- a/tools/maprangecheck/main.go
+++ b/tools/maprangecheck/main.go
@@ -1,3 +1,21 @@
+/*
+ * Cadence - The resource-oriented smart contract programming language
+ *
+ * Copyright 2019-2021 Dapper Labs, Inc.
+ *
+ * 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/tools/maprangecheck/testdata/test.go b/tools/maprangecheck/testdata/test.go
index dc53fdbd82..e79bc0cec1 100644
--- a/tools/maprangecheck/testdata/test.go
+++ b/tools/maprangecheck/testdata/test.go
@@ -1,29 +1,49 @@
+/*
+ * Cadence - The resource-oriented smart contract programming language
+ *
+ * Copyright 2019-2021 Dapper Labs, Inc.
+ *
+ * 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 testdata
 
 func testVariable() {
 	var m map[string]int
 
-	for range m {}  // want "range statement over map: map\\[string\\]int"
+	for range m {
+	} // want "range statement over map: map\\[string\\]int"
 }
 
-
 func returnMap() map[int]string {
 	return nil
 }
 
 func testFunc() {
-	for range returnMap() {}  // want "range statement over map: map\\[int\\]string"
+	for range returnMap() {
+	} // want "range statement over map: map\\[int\\]string"
 }
 
 func testTypeDef() {
 	type M map[string]int
 	var m M
-	for range m {}  // want "range statement over map: map\\[string\\]int"
+	for range m {
+	} // want "range statement over map: map\\[string\\]int"
 }
 
 func testTypeAlias() {
 	type M = map[string]int
 	var m M
-	for range m {}  // want "range statement over map: map\\[string\\]int"
+	for range m {
+	} // want "range statement over map: map\\[string\\]int"
 }
-