Updated OTC requirements in README.md

Author: Ken Lunde

README.md

@@ -10,15 +10,15 @@ Select this deployment format if you want all languages and all weights in a sin
 
 The ZIP file for the Super OTC has been necessarily split into two parts, due to GitHub's 100MB file size limit. Unfortunately, the built-in *Archive Utility* app of macOS does not support split ZIP files, and we therefore recommend that you download and install the [Unarchiver](http://unarchiver.c3.cx/unarchiver) app. To unzip, either drag the Part 2 file (the one with the ".zip" filename extension, and named *SourceHanSerif.ttc.zip*) onto the *Unarchiver* app, or use Control-Click to open it by specifying that app (after installing the *Unarchiver* app, you may also be able to simply double-click the Part 2 file). Either of these actions will combine the two parts and unzip them. For Windows, select the Part 2 file, then use the "Extract All" context menu to combine the two parts and unzip them.
 
-**Special Note**: This deployment format requires macOS (OS X) Version 10.8 (aka *Mountain Lion*) or later, iOS 7 or later, or Windows 10 Version 1703 (aka *Creators Update*) or later. For Adobe apps, use CS6 or later.
+**Special Note**: This deployment format requires macOS (OS X) Version 10.8 (aka *Mountain Lion*) or later, iOS 7 or later, Windows 10 Version 1703 (aka *Creators Update*) or later, a flavor of Linux that uses *fontconfig* and FreeType Version 2.5.0.1 or greater, or Adobe CS6 apps or later.
 
 ### OTCs
 
 Select this deployment format if you want all languages and some weights, or if your environment does not support the Super OTC. Changing languages is accomplished the same way as the Super OTC. If you need specific weights, download individual font resources from the [OTC](OTC) folder, otherwise click both of the links below:
 
 [ExtraLight + Light + Regular + Medium](https://github.com/adobe-fonts/source-han-serif/raw/release/OTC/SourceHanSerifOTC_EL-M.zip) & [SemiBold + Bold + Heavy](https://github.com/adobe-fonts/source-han-serif/raw/release/OTC/SourceHanSerifOTC_SB-H.zip)
 
-**Special Note**: This deployment format requires macOS (OS X) Version 10.8 (aka *Mountain Lion*) or later, iOS 7 or later, or Windows 10 Version 1607 (aka *Anniversary Update*) or later. For Adobe apps, use CS6 or later.
+**Special Note**: This deployment format requires macOS (OS X) Version 10.8 (aka *Mountain Lion*) or later, iOS 7 or later, Windows 10 Version 1607 (aka *Anniversary Update*) or later, a flavor of Linux that uses *fontconfig* and FreeType Version 2.5.0.1 or greater, or Adobe CS6 apps or later.
 
 ### Language-specific OTFs