diff --git a/Installation.md b/Installation.md
index aee0633..c3094fb 100644
--- a/Installation.md
+++ b/Installation.md
@@ -20,6 +20,9 @@ brew install unar
 brew install sevenzip
 ```
 
+`p7zip` is for KCC 7 and earlier.
+`sevenzip` is for KCC 8+
+
 ## KindleGen
 
 ### Windows / Mac