diff --git a/.travis.yml b/.travis.yml
index b1a1654..02bbbd2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,29 +2,18 @@ language: erlang
 sudo: false
 otp_release:
 # Test on all supported releases
-   - 20.0
-   - 19.3
-   - 19.2
-   - 19.1
-   - 19.0
-   - 18.3
-   - 18.2.1
-   - 18.1
-   - 18.0
-   - 17.5
-   - 17.4
-   - 17.3
-   - 17.1
-   - 17.0
-   - R16B03-1
-   - R16B03
-   - R16B02
-   - R16B01
-   - R16B
-   - R15B03
-   - R15B02
-   - R15B01
-   - R15B
+  - 20.2
+  - 20.1
+  - 20.0
+  - 19.3
+  - 19.2
+  - 19.1
+  - 19.0
+  - 18.3
+  - 18.2.1
+  - 18.1
+  - 18.0
+  - 17.5
 
 script:
   - make
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..d135e5a
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) 2010-2014 Evan Miller
+Copyright (c) 2014-2018 ChicagoBoss Team and contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/src/aleppo.app.src b/src/aleppo.app.src
index a6d1b26..297470a 100644
--- a/src/aleppo.app.src
+++ b/src/aleppo.app.src
@@ -1,7 +1,7 @@
 %% -*- mode: erlang -*-
 {application, aleppo,
  [{description, "Aleppo: ALternative Erlang Pre-ProcessOr"},
-  {vsn, "0.9.2"},
+  {vsn, "0.9.3"},
   {modules, []},
   {applications, [kernel, stdlib]},
   {registered, []},
diff --git a/src/aleppo.erl b/src/aleppo.erl
index 08b5ea9..54f5651 100644
--- a/src/aleppo.erl
+++ b/src/aleppo.erl
@@ -1,4 +1,14 @@
-% Aleppo: ALternative Erlang Pre-ProcessOr
+%%-------------------------------------------------------------------
+%% @author
+%%     ChicagoBoss Team and contributors
+%% @end
+%% @copyright
+%%     This file is part of ChicagoBoss project.
+%%     for license information, see LICENSE file in root directory
+%% @end
+%% @doc Aleppo: ALternative Erlang Pre-ProcessOr
+%%-------------------------------------------------------------------
+
 -module(aleppo).
 -export([process_file/1, process_file/2, process_tokens/1, process_tokens/2, scan_file/1]).