diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9d3fb7574..b2fc8ac29 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,7 +7,7 @@ jobs:
     name: build (${{ matrix.ruby }}/${{ matrix.test_mode }})
     strategy:
       matrix:
-        ruby: [ '3.3', '3.2', '3.1', '3.0', '2.7' ]
+        ruby: [ '3.3', '3.2', '3.1', '3.0' ]
         test_mode: [ rack, gem ]
     runs-on: ubuntu-latest
     steps:
diff --git a/ChangeLog b/ChangeLog
index f167154bb..8301c6719 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2024-02-29 Hiroshi SHIBATA <hsbt@ruby-lang.org>
+	* support Ruby 3.2 and 3.3.
+	* drop to support Ruby 2.7.
+	* release 5.3.0
+
 2022-11-29 Tada, Tadashi <t@tdtds.jp>
 	* support rack 3.x
 	* support dalli 3.x
diff --git a/lib/tdiary/tasks/release.rake b/lib/tdiary/tasks/release.rake
index d9e8c9e87..30658be7e 100644
--- a/lib/tdiary/tasks/release.rake
+++ b/lib/tdiary/tasks/release.rake
@@ -50,7 +50,7 @@ begin
 				end
 
 				Dir.chdir '.bundle/ruby' do
-					versions = %w(2.7.0 3.0.0 3.1.0)
+					versions = %w(3.0.0 3.1.0 3.2.0 3.3.0)
 					current = `ls`.chomp
 					versions.each {|version|
 						FileUtils.cp_r current, version unless current == version
diff --git a/lib/tdiary/version.rb b/lib/tdiary/version.rb
index 24f6b8e51..8467a6526 100644
--- a/lib/tdiary/version.rb
+++ b/lib/tdiary/version.rb
@@ -1,3 +1,3 @@
 module TDiary
-	VERSION = '5.2.4'
+	VERSION = '5.3.0'
 end