diff --git a/Makefile b/Makefile
index 055c0fb..9474434 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 PKG_NAME := acrn-hypervisor
-URL = https://github.com/projectacrn/acrn-hypervisor/archive/acrn-2018w27.3-140000p.tar.gz
+URL = https://github.com/projectacrn/acrn-hypervisor/archive/acrn-2018w27.4-140000p.tar.gz
 ARCHIVES = 
 
 include ../common/Makefile.common
diff --git a/acrn-hypervisor.spec b/acrn-hypervisor.spec
index 2739183..dc1dad0 100644
--- a/acrn-hypervisor.spec
+++ b/acrn-hypervisor.spec
@@ -3,10 +3,10 @@
 # Generated by: autospec.py
 #
 Name     : acrn-hypervisor
-Version  : 2018w27.3.140000p
-Release  : 38
-URL      : https://github.com/projectacrn/acrn-hypervisor/archive/acrn-2018w27.3-140000p.tar.gz
-Source0  : https://github.com/projectacrn/acrn-hypervisor/archive/acrn-2018w27.3-140000p.tar.gz
+Version  : 2018w27.4.140000p
+Release  : 39
+URL      : https://github.com/projectacrn/acrn-hypervisor/archive/acrn-2018w27.4-140000p.tar.gz
+Source0  : https://github.com/projectacrn/acrn-hypervisor/archive/acrn-2018w27.4-140000p.tar.gz
 Summary  : No detailed summary available
 Group    : Development/Tools
 License  : BSD-3-Clause CC-BY-4.0 ISC
@@ -85,7 +85,7 @@ license components for the acrn-hypervisor package.
 
 
 %prep
-%setup -q -n acrn-hypervisor-acrn-2018w27.3-140000p
+%setup -q -n acrn-hypervisor-acrn-2018w27.4-140000p
 %patch1 -p1
 %patch2 -p1
 
@@ -94,11 +94,11 @@ export http_proxy=http://127.0.0.1:9/
 export https_proxy=http://127.0.0.1:9/
 export no_proxy=localhost,127.0.0.1,0.0.0.0
 export LANG=C
-export SOURCE_DATE_EPOCH=1530692007
+export SOURCE_DATE_EPOCH=1530785756
 make  %{?_smp_mflags} all sbl-hypervisor
 
 %install
-export SOURCE_DATE_EPOCH=1530692007
+export SOURCE_DATE_EPOCH=1530785756
 rm -rf %{buildroot}
 mkdir -p %{buildroot}/usr/share/doc/acrn-hypervisor
 cp LICENSE %{buildroot}/usr/share/doc/acrn-hypervisor/LICENSE
diff --git a/options.conf b/options.conf
index 60d0ab5..71a71d5 100644
--- a/options.conf
+++ b/options.conf
@@ -1,6 +1,6 @@
 [package]
 name = acrn-hypervisor
-url = https://github.com/projectacrn/acrn-hypervisor/archive/acrn-2018w27.3-140000p.tar.gz
+url = https://github.com/projectacrn/acrn-hypervisor/archive/acrn-2018w27.4-140000p.tar.gz
 archives = 
 giturl = https://github.com/projectacrn/acrn-hypervisor.git
 
diff --git a/release b/release
index e522732..a272009 100644
--- a/release
+++ b/release
@@ -1 +1 @@
-38
+39
diff --git a/upstream b/upstream
index a946a5d..0c9bd89 100644
--- a/upstream
+++ b/upstream
@@ -1 +1 @@
-9281e5345dfbb185d2540eb2b8c240054f58f965/acrn-2018w27.3-140000p.tar.gz
+d35d5a6671bba8af06e0d7d2b5013619d1f051f5/acrn-2018w27.4-140000p.tar.gz