diff --git a/README.txt b/README.txt
index 834800b0ab0967ca1cd53fa856e9440a52d5c20b..9a925a2564a888db38f0c6a90d8fdc322d815ae4 100644
--- a/README.txt
+++ b/README.txt
@@ -30,9 +30,9 @@ CONTENTS
 REQUIREMENTS
 
   Coq 
-  8GB ram
+  8GB ram + 4GB swap
 
-  We have tested the development using Coq v. 8.4pl4 on a machine with 8GB RAM + 4GB swap.  
+  We have tested the development using Coq v. 8.4pl4 on Linux and Mac machines with at least 8GB RAM + 4GB swap.
   
 
 HOW TO COMPILE