diff --git a/README.md b/README.md
index 9fa59c1..6b4d6db 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,7 @@ Exceptions will be allowed for good reasons.
 
 | category | library                                                               | license              | API |files| description
 | ---------| --------------------------------------------------------------------- |:--------------------:|:---:|:---:| -----------
+| UI       | [wcwidth9](https://github.com/joshuarubin/wcwidth9)                   | Apache 2.0           | C   |  1  | platform independent wcwidth with full unicode 9 support
 | audio    |  [tinysound](https://github.com/RandyGaul/tinyheaders)                | zlib                 |C/C++|**1**| direct sound audio mixer & WAV loader
 | argv     |  [flags](https://github.com/sailormoon/flags)                         | **public domain**    | C++ |**1**| command-line argument parsing
 | argv     |  [optionparser](http://optionparser.sourceforge.net/)                 | MIT                  | C++ |**1**| command-line argument parsing
@@ -332,6 +333,7 @@ as C/C++, as this is not an obstacle to most users.)
 #user interface
 | library                                                               | license              | API |files| description
 | --------------------------------------------------------------------- |:--------------------:|:---:|:---:| -----------
+|  [wcwidth9](https://github.com/joshuarubin/wcwidth9)                  | Apache 2.0           | C   |  1  | platform independent wcwidth with full unicode 9 support
 |  [dear imgui](https://github.com/ocornut/imgui)                       | MIT                  | C++ |  9  | an immediate-mode GUI formerly named "ImGui"; [3rd-party C wrapper](https://github.com/Extrawurst/cimgui)
 |  [nuklear](https://github.com/vurtun/nuklear)                         | **public domain**    |C/C++|**1**| minimal GUI toolkit
 |  [noc_file_dialog.h](https://github.com/guillaumechereau/noc)         | MIT                  |C/C++|  1  | file open/save dialogs (Linux/OSX/Windows)