diff --git a/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/Experimental.java b/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/Experimental.java
index bbbbb0caf..248643dd3 100644
--- a/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/Experimental.java
+++ b/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/Experimental.java
@@ -1,13 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you 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
+ * Copyright 2023 Ververica Inc.
  *
- * http://www.apache.org/licenses/LICENSE-2.0
+ * 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,
diff --git a/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/Internal.java b/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/Internal.java
index e310567c2..ae7ff9157 100644
--- a/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/Internal.java
+++ b/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/Internal.java
@@ -1,11 +1,9 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you 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
+ * Copyright 2023 Ververica 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
  *
@@ -14,7 +12,6 @@
  * 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 com.ververica.cdc.common.annotation;
diff --git a/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/Public.java b/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/Public.java
index 062cb2661..605736261 100644
--- a/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/Public.java
+++ b/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/Public.java
@@ -1,13 +1,11 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you 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
+ * Copyright 2023 Ververica Inc.
  *
- * http://www.apache.org/licenses/LICENSE-2.0
+ * 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,
diff --git a/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/PublicEvolving.java b/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/PublicEvolving.java
index 6d5a1d708..ae00d8524 100644
--- a/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/PublicEvolving.java
+++ b/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/PublicEvolving.java
@@ -1,11 +1,9 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you 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
+ * Copyright 2023 Ververica 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
  *
@@ -14,7 +12,6 @@
  * 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 com.ververica.cdc.common.annotation;
diff --git a/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/VisibleForTesting.java b/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/VisibleForTesting.java
index ab9e2f96b..ba0acf7a7 100644
--- a/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/VisibleForTesting.java
+++ b/flink-cdc-common/src/main/java/com/ververica/cdc/common/annotation/VisibleForTesting.java
@@ -1,11 +1,9 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you 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
+ * Copyright 2023 Ververica 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
  *
@@ -14,7 +12,6 @@
  * 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 com.ververica.cdc.common.annotation;
diff --git a/flink-cdc-common/src/main/java/com/ververica/cdc/common/types/VarBinaryType.java b/flink-cdc-common/src/main/java/com/ververica/cdc/common/types/VarBinaryType.java
index 884070fed..812b3146e 100644
--- a/flink-cdc-common/src/main/java/com/ververica/cdc/common/types/VarBinaryType.java
+++ b/flink-cdc-common/src/main/java/com/ververica/cdc/common/types/VarBinaryType.java
@@ -1,11 +1,9 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you 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
+ * Copyright 2023 Ververica 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
  *
diff --git a/flink-cdc-common/src/main/java/com/ververica/cdc/common/types/VarCharType.java b/flink-cdc-common/src/main/java/com/ververica/cdc/common/types/VarCharType.java
index 6b1276521..82105f463 100644
--- a/flink-cdc-common/src/main/java/com/ververica/cdc/common/types/VarCharType.java
+++ b/flink-cdc-common/src/main/java/com/ververica/cdc/common/types/VarCharType.java
@@ -1,11 +1,9 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you 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
+ * Copyright 2023 Ververica 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
  *
diff --git a/flink-cdc-connect/flink-cdc-source-connectors/flink-connector-mysql-cdc/src/test/java/com/ververica/cdc/connectors/mysql/source/reader/MySqlRecordEmitterTest.java b/flink-cdc-connect/flink-cdc-source-connectors/flink-connector-mysql-cdc/src/test/java/com/ververica/cdc/connectors/mysql/source/reader/MySqlRecordEmitterTest.java
index 8f4c51c61..58b484a8a 100644
--- a/flink-cdc-connect/flink-cdc-source-connectors/flink-connector-mysql-cdc/src/test/java/com/ververica/cdc/connectors/mysql/source/reader/MySqlRecordEmitterTest.java
+++ b/flink-cdc-connect/flink-cdc-source-connectors/flink-connector-mysql-cdc/src/test/java/com/ververica/cdc/connectors/mysql/source/reader/MySqlRecordEmitterTest.java
@@ -1,5 +1,3 @@
-package com.ververica.cdc.connectors.mysql.source.reader;
-
 /*
  * Copyright 2023 Ververica Inc.
  *
@@ -16,6 +14,8 @@ package com.ververica.cdc.connectors.mysql.source.reader;
  * limitations under the License.
  */
 
+package com.ververica.cdc.connectors.mysql.source.reader;
+
 import org.apache.flink.api.common.typeinfo.TypeInformation;
 import org.apache.flink.connector.testutils.source.reader.TestingReaderOutput;
 import org.apache.flink.runtime.metrics.groups.UnregisteredMetricGroups;
diff --git a/pom.xml b/pom.xml
index 58e3ff379..9f632b312 100644
--- a/pom.xml
+++ b/pom.xml
@@ -266,7 +266,6 @@ under the License.
                                 implementation="org.apache.rat.analysis.license.SimplePatternBasedLicense">
                             <licenseFamilyCategory>AL2</licenseFamilyCategory>
                             <licenseFamilyName>Apache License 2.0</licenseFamilyName>
-                            <notes/>
                             <patterns>
                                 <pattern>Copyright 2023 Ververica Inc.
                                 </pattern>
diff --git a/tools/maven/checkstyle.xml b/tools/maven/checkstyle.xml
index 367a7b050..aedb80841 100644
--- a/tools/maven/checkstyle.xml
+++ b/tools/maven/checkstyle.xml
@@ -556,5 +556,13 @@ This file is based on the checkstyle file of Apache Beam.
 		</module>
 
 	</module>
+
+	<!-- check file header copyright -->
+	<module name="RegexpHeader">
+		<!-- regex expression to check -->
+		<property name="header" value="\/\*\n \* Copyright 2023 Ververica Inc\."/>
+		<property name="fileExtensions" value="java"/> <!-- only java files -->
+	</module>
+
 </module>
 
diff --git a/tools/maven/suppressions.xml b/tools/maven/suppressions.xml
index 9f05117d8..1f9fe9a1c 100644
--- a/tools/maven/suppressions.xml
+++ b/tools/maven/suppressions.xml
@@ -82,8 +82,8 @@ under the License.
 				files="io[\\/]debezium[\\/]connector[\\/]postgresql[\\/]"
 				checks=".*"/>
 		<suppress
-			files="io[\\/]debezium[\\/]connector[\\/]oracle[\\/]"
-			checks=".*"/>
+				files="io[\\/]debezium[\\/]"
+				checks=".*"/>
 		<!-- target directory is not relevant for checkstyle -->
 		<suppress
 			files="[\\/]target[\\/]"