diff --git a/apps/emqx_ldap/.gitignore b/apps/emqx_ldap/.gitignore
index b912731cf..3b0d6b553 100644
--- a/apps/emqx_ldap/.gitignore
+++ b/apps/emqx_ldap/.gitignore
@@ -1,2 +1,2 @@
 src/emqx_ldap_filter_lexer.erl
-src/emqx_ldap_filter_parser.erl
\ No newline at end of file
+src/emqx_ldap_filter_parser.erl
diff --git a/apps/emqx_ldap/src/emqx_ldap.erl b/apps/emqx_ldap/src/emqx_ldap.erl
index 173edbe11..7fed819de 100644
--- a/apps/emqx_ldap/src/emqx_ldap.erl
+++ b/apps/emqx_ldap/src/emqx_ldap.erl
@@ -1,6 +1,7 @@
 %%--------------------------------------------------------------------
 %% Copyright (c) 2023 EMQ Technologies Co., Ltd. All Rights Reserved.
 %%--------------------------------------------------------------------
+
 -module(emqx_ldap).
 
 -include_lib("emqx_connector/include/emqx_connector.hrl").
diff --git a/apps/emqx_ldap/src/emqx_ldap_filter_lexer.xrl b/apps/emqx_ldap/src/emqx_ldap_filter_lexer.xrl
index 5c0e178d6..6d75c2546 100644
--- a/apps/emqx_ldap/src/emqx_ldap_filter_lexer.xrl
+++ b/apps/emqx_ldap/src/emqx_ldap_filter_lexer.xrl
@@ -25,3 +25,7 @@ dn : {token, {dn, TokenLine}}.
 {Control} : {error, lists:flatten(io_lib:format("Unexpected Tokens:~ts", [TokenChars]))}.
 
 Erlang code.
+
+%%--------------------------------------------------------------------
+%% Copyright (c) 2022-2023 EMQ Technologies Co., Ltd. All Rights Reserved.
+%%--------------------------------------------------------------------
diff --git a/apps/emqx_ldap/src/emqx_ldap_filter_parser.yrl b/apps/emqx_ldap/src/emqx_ldap_filter_parser.yrl
index 84e412f21..57f526ffd 100644
--- a/apps/emqx_ldap/src/emqx_ldap_filter_parser.yrl
+++ b/apps/emqx_ldap/src/emqx_ldap_filter_parser.yrl
@@ -1,3 +1,7 @@
+Header "%%--------------------------------------------------------------------
+%% Copyright (c) 2022-2023 EMQ Technologies Co., Ltd. All Rights Reserved.
+%%--------------------------------------------------------------------".
+
 Nonterminals
 filter filtercomp filterlist item simple present substring initial any final extensible attr value type dnattrs matchingrule.
 
diff --git a/apps/emqx_ldap/test/emqx_ldap_SUITE.erl b/apps/emqx_ldap/test/emqx_ldap_SUITE.erl
index 8a2b67929..9386b1738 100644
--- a/apps/emqx_ldap/test/emqx_ldap_SUITE.erl
+++ b/apps/emqx_ldap/test/emqx_ldap_SUITE.erl
@@ -1,17 +1,6 @@
-% %%--------------------------------------------------------------------
-% %% Copyright (c) 2020-2023 EMQ Technologies Co., Ltd. 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.
-% %%--------------------------------------------------------------------
+%%--------------------------------------------------------------------
+%% Copyright (c) 2022-2023 EMQ Technologies Co., Ltd. All Rights Reserved.
+%%--------------------------------------------------------------------
 
 -module(emqx_ldap_SUITE).
 
diff --git a/apps/emqx_ldap/test/emqx_ldap_filter_SUITE.erl b/apps/emqx_ldap/test/emqx_ldap_filter_SUITE.erl
index 8ea322ff1..0351fb93d 100644
--- a/apps/emqx_ldap/test/emqx_ldap_filter_SUITE.erl
+++ b/apps/emqx_ldap/test/emqx_ldap_filter_SUITE.erl
@@ -1,17 +1,6 @@
-% %%--------------------------------------------------------------------
-% %% Copyright (c) 2020-2023 EMQ Technologies Co., Ltd. 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.
-% %%--------------------------------------------------------------------
+%%--------------------------------------------------------------------
+%% Copyright (c) 2022-2023 EMQ Technologies Co., Ltd. All Rights Reserved.
+%%--------------------------------------------------------------------
 
 -module(emqx_ldap_filter_SUITE).