Update prngd link to point to sourceforge.
diff --git a/README b/README
index 0a0c791..7e7505a 100644
--- a/README
+++ b/README
@@ -56,7 +56,7 @@
 
 [0] https://www.openssh.com/
 [1] http://www.lothar.com/tech/crypto/
-[2] http://www.aet.tu-cottbus.de/personen/jaenicke/postfix_tls/prngd.html
+[2] http://prngd.sourceforge.net/
 [3] http://www.gzip.org/zlib/
 [4] http://www.openssl.org/
 [5] http://www.openpam.org