diff --git a/.readthedocs.yml b/.readthedocs.yml
index 9869847c3..5f8180215 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -1,4 +1,3 @@
-#
 # 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.
@@ -6,14 +5,13 @@
 # (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
+# 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.
-#
 
 version: 2
 
diff --git a/.travis.yml b/.travis.yml
index eae98b6c5..65f5a0240 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,3 @@
-#
 # 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.
@@ -6,14 +5,13 @@
 # (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
+# 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.
-#
 
 sudo: required
 
diff --git a/_config.yml b/_config.yml
index 519721266..a3fb8b603 100644
--- a/_config.yml
+++ b/_config.yml
@@ -1 +1,16 @@
+# 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
+#
+# 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.
+
 theme: jekyll-theme-leap-day
diff --git a/codecov.yml b/codecov.yml
index 66f794218..bf97e094d 100644
--- a/codecov.yml
+++ b/codecov.yml
@@ -1,3 +1,18 @@
+# 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
+#
+# 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.
+
 codecov:
   token: 6c25f14f-ec5c-40d2-b2e2-482013acca13
 
diff --git a/kyuubi-common/src/main/scala/org/apache/kyuubi/service/KinitAuxiliaryService.scala b/kyuubi-common/src/main/scala/org/apache/kyuubi/service/KinitAuxiliaryService.scala
index bc0446b5f..a44738d49 100644
--- a/kyuubi-common/src/main/scala/org/apache/kyuubi/service/KinitAuxiliaryService.scala
+++ b/kyuubi-common/src/main/scala/org/apache/kyuubi/service/KinitAuxiliaryService.scala
@@ -84,4 +84,3 @@ class KinitAuxiliaryService() extends AbstractService("KinitAuxiliaryService") {
     }
   }
 }
-
diff --git a/kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/AnonymousAuthenticationProviderImpl.scala b/kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/AnonymousAuthenticationProviderImpl.scala
index dd51a9378..9b39314e9 100644
--- a/kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/AnonymousAuthenticationProviderImpl.scala
+++ b/kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/AnonymousAuthenticationProviderImpl.scala
@@ -14,6 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.apache.kyuubi.service.authentication
 
 /**
diff --git a/kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/KyuubiAuthenticationFactory.scala b/kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/KyuubiAuthenticationFactory.scala
index fa552236c..32c18674c 100644
--- a/kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/KyuubiAuthenticationFactory.scala
+++ b/kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/KyuubiAuthenticationFactory.scala
@@ -17,7 +17,6 @@
 
 package org.apache.kyuubi.service.authentication
 
-
 import java.io.IOException
 import javax.security.auth.login.LoginException
 import javax.security.sasl.Sasl
diff --git a/kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/KyuubiDelegationTokenManager.scala b/kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/KyuubiDelegationTokenManager.scala
index 3c941589c..9bc98da89 100644
--- a/kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/KyuubiDelegationTokenManager.scala
+++ b/kyuubi-common/src/main/scala/org/apache/kyuubi/service/authentication/KyuubiDelegationTokenManager.scala
@@ -34,7 +34,6 @@ case class KyuubiDelegationTokenManager(
   }
 }
 
-
 object KyuubiDelegationTokenManager {
 
   def apply(conf: KyuubiConf): KyuubiDelegationTokenManager = {