diff --git a/README.txt b/README.txt
index 559099b73a..f11b1b441a 100644
--- a/README.txt
+++ b/README.txt
@@ -29,3 +29,5 @@ The following provides more details on the included cryptographic
 software:
   Hadoop Core uses the SSL libraries from the Jetty project written 
 by mortbay.org.
+  Hadoop Yarn Server Web Proxy uses the BouncyCastle Java
+cryptography APIs written by the Legion of the Bouncy Castle Inc.