diff --git a/README.md b/README.md
index 7fab056..48d2270 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,10 @@ You'll need to install various tools to access important but optional features.
 
 ### 7-Zip
 
+Required if you are using an older Windows version (~2018).
+
+Optional otherwise for metadata editing.
+
 #### Windows 7-Zip
 
 First install the `64-bit x64` version of 7z from https://www.7-zip.org/ or with command line: