diff --git a/README.rst b/README.rst
index a7421697..b261e7fa 100644
--- a/README.rst
+++ b/README.rst
@@ -1,7 +1,7 @@
 USB Audio Shared
 ................
 
-:Latest release: 6.4.0beta3
+:Latest release: 6.4.0beta4
 :Maintainer: xross
 :Description: USB Audio Shared Components. For use in the XMOS USB Audio Refererence Designs.
 
diff --git a/xpd.xml b/xpd.xml
index a83a3cbf..2653a8a7 100644
--- a/xpd.xml
+++ b/xpd.xml
@@ -46,7 +46,8 @@
     <release parenthash = "e90ed6b9ec4c366520bbc7546f463bd003f30c59" version = "6.4.0beta0" githash = "95a7caf8beb8afb74abe3323267710c0678dd32b"></release>
     <release parenthash = "90eacf1170afb807c0541704fb94acb722215255" version = "6.4.0beta1" githash = "92087a2d40da2276c06dffd2b616532e65ea002d"></release>
     <release parenthash = "fe3b0251da73729f957b1a5a766fe60b494d717a" version = "6.4.0beta2" githash = "432d39434a59418ef3449ae02005bf12e8f6fc61"></release>
-    <release parenthash = "bbd02f157fba840d918838a4922ca5b1fa4cae21" version = "6.4.0beta3"></release>
+    <release parenthash = "bbd02f157fba840d918838a4922ca5b1fa4cae21" version = "6.4.0beta3" githash = "c6ed243a82555bd3e2825dad48266e3a307db716"></release>
+    <release parenthash = "486a19f54934e9eaa6662f316a4913b9af5db43b" version = "6.4.0beta4"></release>
     <subpartnumber>XM-004720-SM</subpartnumber>
     <vendor>XMOS</vendor>
     <version_defines>