diff --git a/README.md b/README.md
index 20a6381..116e1b0 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,9 @@ Automatically edits videos. Explanation here: https://www.youtube.com/watch?v=DQ
 
 ## Some heads-up:
 
-I have only ever tested this on Ubuntu 16.04... not sure if that makes a difference!
+It uses Python 3.
+
+It works on Ubuntu 16.04 and Windows 10. (It might work on other OSs too, we just haven't tested it yet.)
 
 This program relies heavily on ffmpeg. It will start subprocesses that call ffmpeg, so be aware of that!