diff --git a/lib/README.md b/lib/README.md
index 068a9f63ccf799b833e30f844d939f7470d9df84..7312eaba6872b39ae32d46e4ead9fb43f68ba7de 100644
--- a/lib/README.md
+++ b/lib/README.md
@@ -1,4 +1,5 @@
-This directory contains libraries which are required at runtime to use the following classes:
+This directory contains necessary libraries (commons-io and guava) which are 
+required at runtime to use the following classes:
 
 1.  <pre>edu.nps.moves.dis7.utilities.stream.PduRecorder</pre>
 2.  <pre>edu.nps.moves.dis7.examples.PduReaderPlayer</pre>