diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..78a4674
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019 BlackMark
+
+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 (including the next
+paragraph) 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/uart/flash b/uart/flash
index 2c66479..9245b49 160000
--- a/uart/flash
+++ b/uart/flash
@@ -1 +1 @@
-Subproject commit 2c66479a49953a6649a375c0b3e5999f64b2223d
+Subproject commit 9245b49e4c981098ca966343f396f5064f762fb5
diff --git a/uart/io b/uart/io
index 571f28a..986ceef 160000
--- a/uart/io
+++ b/uart/io
@@ -1 +1 @@
-Subproject commit 571f28ab05bb013f512657cc26b4818bbf0abc25
+Subproject commit 986ceef65d1888e62ba759755def449915d3f9b9
diff --git a/uart/uart b/uart/uart
index 0532bf4..2a2b9b8 160000
--- a/uart/uart
+++ b/uart/uart
@@ -1 +1 @@
-Subproject commit 0532bf48b03ecf8de7f77686ffedd54ebc0ca33b
+Subproject commit 2a2b9b881758ad9477744783743ef3e0cb9c9536