diff --git a/README.md b/README.md
index 779ff4c..cff05af 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 
 ## Requirements:
-- 64 bit Linux system and 8 GB of RAM.
+- Ubuntu 16.04 64-bit and 8 GB of RAM.
 
 To compress:
 
@@ -34,7 +34,7 @@ fastq_file_fastq
 
 ## MFCompress and Lpaq8
 
-We provide a precompiled version of both compressors for 64 bit systems, no further action needed.
+We provide a precompiled version of both compressors for Ubuntu 16.04 64-bit, no further action needed beside chmod MFCompressC, MFCompressD, and lpaq8.
 
 ## Contact