diff --git a/maxkey-common/src/main/java/org/maxkey/util/IdGenerator.java b/maxkey-common/src/main/java/org/maxkey/util/IdGenerator.java
index 1c04f7cb..b90041ed 100644
--- a/maxkey-common/src/main/java/org/maxkey/util/IdGenerator.java
+++ b/maxkey-common/src/main/java/org/maxkey/util/IdGenerator.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright [2021] [MaxKey of copyright http://www.maxkey.top]
+ * 
+ * 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 org.maxkey.util;
 
 public class IdGenerator {
diff --git a/maxkey-common/src/main/java/org/maxkey/util/SnowFlakeId.java b/maxkey-common/src/main/java/org/maxkey/util/SnowFlakeId.java
index 16aa7d64..7c0d09ef 100644
--- a/maxkey-common/src/main/java/org/maxkey/util/SnowFlakeId.java
+++ b/maxkey-common/src/main/java/org/maxkey/util/SnowFlakeId.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright [2021] [MaxKey of copyright http://www.maxkey.top]
+ * 
+ * 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 org.maxkey.util;
 
 import java.util.Calendar;
@@ -188,4 +205,4 @@ public class SnowFlakeId {
 
 
     }
-}
\ No newline at end of file
+}
diff --git a/maxkey-core/src/main/java/org/maxkey/domain/Notices.java b/maxkey-core/src/main/java/org/maxkey/domain/Notices.java
index 637d6dc7..9dcfeac9 100644
--- a/maxkey-core/src/main/java/org/maxkey/domain/Notices.java
+++ b/maxkey-core/src/main/java/org/maxkey/domain/Notices.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright [2021] [MaxKey of copyright http://www.maxkey.top]
+ * 
+ * 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 org.maxkey.domain;
 
 import java.io.Serializable;
diff --git a/maxkey-core/src/main/java/org/maxkey/web/WebXssRequestFilter.java b/maxkey-core/src/main/java/org/maxkey/web/WebXssRequestFilter.java
index 3f656c72..5676ac75 100644
--- a/maxkey-core/src/main/java/org/maxkey/web/WebXssRequestFilter.java
+++ b/maxkey-core/src/main/java/org/maxkey/web/WebXssRequestFilter.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright [2021] [MaxKey of copyright http://www.maxkey.top]
+ * 
+ * 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 org.maxkey.web;
 
 import java.io.IOException;
diff --git a/maxkey-core/src/test/java/org/maxkey/EscapeHtml4Test.java b/maxkey-core/src/test/java/org/maxkey/EscapeHtml4Test.java
index c37d5da8..b7a48829 100644
--- a/maxkey-core/src/test/java/org/maxkey/EscapeHtml4Test.java
+++ b/maxkey-core/src/test/java/org/maxkey/EscapeHtml4Test.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright [2021] [MaxKey of copyright http://www.maxkey.top]
+ * 
+ * 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 org.maxkey;
 
 import java.sql.SQLException;
diff --git a/maxkey-protocols/maxkey-protocol-oauth-2.0/src/main/java/org/maxkey/authz/oauth2/common/OAuth2Constants.java b/maxkey-protocols/maxkey-protocol-oauth-2.0/src/main/java/org/maxkey/authz/oauth2/common/OAuth2Constants.java
index ead89c0b..57b689fb 100644
--- a/maxkey-protocols/maxkey-protocol-oauth-2.0/src/main/java/org/maxkey/authz/oauth2/common/OAuth2Constants.java
+++ b/maxkey-protocols/maxkey-protocol-oauth-2.0/src/main/java/org/maxkey/authz/oauth2/common/OAuth2Constants.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright [2021] [MaxKey of copyright http://www.maxkey.top]
+ * 
+ * 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 org.maxkey.authz.oauth2.common;
 
 public class OAuth2Constants {