diff --git a/xCAT/debian/postinst b/xCAT/debian/postinst
index 09aeaed1e..3fedfd75e 100644
--- a/xCAT/debian/postinst
+++ b/xCAT/debian/postinst
@@ -35,7 +35,9 @@ case "$1" in
             if [ -r "/tmp/xcat/mainservice.pid" ]; then
                 mv /tmp/xcat/mainservice.pid /var/run/xcat/mainservice.pid
             fi
-            xcatconfig -u
+            mkdir -p /var/log/xcat
+            date >> /var/log/xcat/upgrade.log
+            xcatconfig -u -V >> /var/log/xcat/upgrade.log
             rm /tmp/xCAT_upgrade.tmp
         else
             xcatconfig -i -d -s
diff --git a/xCAT/xCAT.spec b/xCAT/xCAT.spec
index 340f20006..e62ae73dd 100644
--- a/xCAT/xCAT.spec
+++ b/xCAT/xCAT.spec
@@ -249,7 +249,9 @@ if [ -r "/tmp/xcat/mainservice.pid" ]; then
   mv /tmp/xcat/mainservice.pid /var/run/xcat/mainservice.pid
 fi
 
-$RPM_INSTALL_PREFIX0/sbin/xcatconfig -u
+mkdir -p /var/log/xcat
+date >> /var/log/xcat/upgrade.log
+$RPM_INSTALL_PREFIX0/sbin/xcatconfig -u -V >> /var/log/xcat/upgrade.log
 fi
 exit 0