diff --git a/casdoor/adapter.go b/casdoor/adapter.go
index 74bdbc4..a6f3091 100644
--- a/casdoor/adapter.go
+++ b/casdoor/adapter.go
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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 casdoor
 
 import (
diff --git a/controllers/account.go b/controllers/account.go
index 389b50d..3d2a8b8 100644
--- a/controllers/account.go
+++ b/controllers/account.go
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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 controllers
 
 import (
diff --git a/controllers/base.go b/controllers/base.go
index 21bb0c8..667b2e5 100644
--- a/controllers/base.go
+++ b/controllers/base.go
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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 controllers
 
 import (
diff --git a/main.go b/main.go
index 800d215..40db5e7 100644
--- a/main.go
+++ b/main.go
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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/object/adapter.go b/object/adapter.go
index ed375be..0599300 100644
--- a/object/adapter.go
+++ b/object/adapter.go
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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 object
 
 import (
diff --git a/storage/aliyun.go b/storage/aliyun.go
index fa300c4..e462a41 100644
--- a/storage/aliyun.go
+++ b/storage/aliyun.go
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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 storage
 
 import (
diff --git a/util/array.go b/util/array.go
index 4b5a676..c658ea9 100644
--- a/util/array.go
+++ b/util/array.go
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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 util
 
 import "fmt"
diff --git a/util/color.go b/util/color.go
index 8e9d5ab..d5bcaeb 100644
--- a/util/color.go
+++ b/util/color.go
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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 util
 
 import (
diff --git a/util/csv.go b/util/csv.go
index 094d030..33eb94b 100644
--- a/util/csv.go
+++ b/util/csv.go
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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 util
 
 import (
diff --git a/util/header.go b/util/header.go
new file mode 100644
index 0000000..c328d1e
--- /dev/null
+++ b/util/header.go
@@ -0,0 +1,53 @@
+package util
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+var licenseText = `// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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.
+
+`
+
+func updateAllHeaders() {
+	err := filepath.Walk("../", func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if !info.IsDir() && (strings.HasSuffix(path, ".go") || strings.HasSuffix(path, ".js") && !strings.Contains(path, "node_modules")) {
+			data, err := os.ReadFile(path)
+			if err != nil {
+				return err
+			}
+
+			if !strings.Contains(string(data), "Licensed under the Apache License") {
+				newData := licenseText + string(data)
+				err = os.WriteFile(path, []byte(newData), info.Mode())
+				if err != nil {
+					return err
+				}
+
+				fmt.Printf("Handled path: [%s]\n", path)
+			}
+		}
+		return nil
+	})
+	if err != nil {
+		panic(err)
+	}
+}
diff --git a/util/header_test.go b/util/header_test.go
new file mode 100644
index 0000000..843cf54
--- /dev/null
+++ b/util/header_test.go
@@ -0,0 +1,7 @@
+package util
+
+import "testing"
+
+func TestUpdateAllHeaders(t *testing.T) {
+	updateAllHeaders()
+}
diff --git a/web/craco.config.js b/web/craco.config.js
index b873f56..2d1256a 100644
--- a/web/craco.config.js
+++ b/web/craco.config.js
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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.
+
 const CracoLessPlugin = require('craco-less');
 
 module.exports = {
diff --git a/web/src/App.js b/web/src/App.js
index b6d85a0..742621a 100644
--- a/web/src/App.js
+++ b/web/src/App.js
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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.
+
 import React, {Component} from "react";
 import {Link, Redirect, Route, Switch, withRouter} from "react-router-dom";
 import {Avatar, BackTop, Dropdown, Layout, Menu} from "antd";
diff --git a/web/src/App.test.js b/web/src/App.test.js
index a2a61c9..534dfa9 100644
--- a/web/src/App.test.js
+++ b/web/src/App.test.js
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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.
+
 import React from "react";
 import {render} from "@testing-library/react";
 import App from "./App";
diff --git a/web/src/AuthCallback.js b/web/src/AuthCallback.js
index d18c5d1..5811cd5 100644
--- a/web/src/AuthCallback.js
+++ b/web/src/AuthCallback.js
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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.
+
 import React from "react";
 import {Button, Result, Spin} from "antd";
 import {withRouter} from "react-router-dom";
diff --git a/web/src/ClusteringPage.js b/web/src/ClusteringPage.js
index 502e210..865d5da 100644
--- a/web/src/ClusteringPage.js
+++ b/web/src/ClusteringPage.js
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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.
+
 import React from "react";
 import * as Conf from "./Conf";
 import * as WordsetBackend from "./backend/WordsetBackend";
diff --git a/web/src/Conf.js b/web/src/Conf.js
index 23ae748..165eace 100644
--- a/web/src/Conf.js
+++ b/web/src/Conf.js
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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.
+
 export const AuthConfig = {
   // serverUrl: "https://door.casdoor.com",
   serverUrl: "http://localhost:7001",
diff --git a/web/src/backend/AccountBackend.js b/web/src/backend/AccountBackend.js
index 940cf7b..ba81c3c 100644
--- a/web/src/backend/AccountBackend.js
+++ b/web/src/backend/AccountBackend.js
@@ -1,3 +1,17 @@
+// Copyright 2023 The casbin Authors. All Rights Reserved.
+//
+// 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.
+
 import * as Setting from "../Setting";
 
 export function getAccount() {