diff --git a/README.org b/README.org
index 6a878bdab52ae4c5f57a1eed90c07621a59d9abd..648c09ab81b3aa6ca89fa25ffaaf2aec29ce2331 100644
--- a/README.org
+++ b/README.org
@@ -1,6 +1,6 @@
 * COMMENT -*- mode: org -*-
 #+Date: 2019-09-02
-Time-stamp: <2020-01-14>
+Time-stamp: <2020-06-03>
 
 * zero-panel
 zero-panel is a dbus service to provides a gtk3 based panel for showing
@@ -43,3 +43,11 @@ rsync and [[https://github.com/jordansissel/fpm][fpm]] is required.
 # in zero-panel source dir
 ./create-deb.sh
 #+END_SRC
+
+* ChangeLog for zero-panel
+
+- v1.3.0 2020-06-03
+  - [feature] support multiple monitor setup.
+
+- v1.2.0 2019-09-02
+  - initial release
diff --git a/operational b/operational
index 5149e51db89b55f55ee90f347f6162f3c0640a36..b8ca50144a9bbeabe7ff064c2586faf78bd07eb8 100644
--- a/operational
+++ b/operational
@@ -3,6 +3,15 @@
 Time-stamp: <2020-06-03>
 #+STARTUP: content
 * notes                                                               :entry:
+** 2020-06-03 how to make a release?
+- update version number in meson.build
+- update ChangeLog in README.org
+- build deb
+  ./create-deb.sh
+- test application in a VM. I will test in s01.
+- build deb for x86 as well.
+- publish deb to apt repo deb.emacsos.com
+
 ** 2020-06-03 how to test dual monitor support
 - dual display test: when user type in emacs frame in a
   display, zero-panel should appear in the same display.