diff --git a/infection_monkey/readme.txt b/infection_monkey/readme.txt
index 0096f98ab..c90b1f6af 100644
--- a/infection_monkey/readme.txt
+++ b/infection_monkey/readme.txt
@@ -74,4 +74,5 @@ Download both 32 and 64 bit zipped DLLs and place them under [code location]\inf
 Alternatively, if you build Mimikatz, put each version in a zip file.
 1. The zip should contain only the Mimikatz DLL named tmpzipfile123456.dll
 2. It should be protected using the password 'VTQpsJPXgZuXhX6x3V84G'.
-3. The zip file should be named mk32.zip/mk64.zip accordingly.
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+3. The zip file should be named mk32.zip/mk64.zip accordingly.
+4. Zipping with 7zip has been tested. Other zipping software may not work.
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