diff --git a/cookbooks/base/timezone.rb b/cookbooks/base/timezone.rb
index 2c76108..2d7f899 100644
--- a/cookbooks/base/timezone.rb
+++ b/cookbooks/base/timezone.rb
@@ -1,5 +1,5 @@
 case run_command('grep VERSION_ID /etc/os-release | awk -F\" \'{print $2}\'').stdout.chomp
-when "18.04"
+when "18.04", "20.04"
   execute 'timedatectl set-timezone Asia/Tokyo' do
     not_if 'timedatectl | grep Tokyo'
   end