diff --git a/meta-phosphor/classes/mrw-rev.bbclass b/meta-phosphor/classes/mrw-rev.bbclass
index 5a5b33c..83c4d27 100644
--- a/meta-phosphor/classes/mrw-rev.bbclass
+++ b/meta-phosphor/classes/mrw-rev.bbclass
@@ -2,4 +2,4 @@
 MRW_API_SRCREV ?= "60c8e10cbb11768cd1ba394b35cb1d6627efec42"
 
 MRW_TOOLS_SRC_URI ?= "git://github.com/openbmc/phosphor-mrw-tools;branch=master;protocol=https"
-MRW_TOOLS_SRCREV ?= "721dcbd23da4f9679ddf58119c478922bf420a1e"
+MRW_TOOLS_SRCREV ?= "b4edc27a3c25cf78c6eeb06f5e45c3b379da445d"