diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4b2632b7..5a1ddfd8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@
 * [#491](https://github.com/slack-ruby/slack-ruby-client/pull/491): Added code coverage - [@dblock](https://github.com/dblock).
 * [#486](https://github.com/slack-ruby/slack-ruby-client/pull/486): Async handler support for Slack::RealTime::Config and Client - [@milestruecar](https://github.com/milestruecar).
 * [#489](https://github.com/slack-ruby-client/pulls/489): Update API from [slack-api-ref@0d3f0b6](https://github.com/slack-ruby/slack-api-ref/commit/0d3f0b6) - [@slack-ruby-ci-bot](https://github.com/apps/slack-ruby-ci-bot).
+* [#493](https://github.com/slack-ruby-client/pulls/493): Update API from [slack-api-ref@f2e768a](https://github.com/slack-ruby/slack-api-ref/commit/f2e768a) - [@slack-ruby-ci-bot](https://github.com/apps/slack-ruby-ci-bot).
 * Your contribution here.
 
 ### 2.1.0 (2023/03/17)
diff --git a/bin/commands/dnd.rb b/bin/commands/dnd.rb
index 41f904a6..6c00aaa0 100644
--- a/bin/commands/dnd.rb
+++ b/bin/commands/dnd.rb
@@ -35,7 +35,7 @@ class App
         g.desc 'Turns on Do Not Disturb mode for the current user, or changes its duration.'
         g.long_desc %( Turns on Do Not Disturb mode for the current user, or changes its duration. )
         g.command 'setSnooze' do |c|
-          c.flag 'num_minutes', desc: 'Number of minutes, from now, to snooze until.'
+          c.flag 'num_minutes', desc: 'This argument is required. Number of minutes, from now, to snooze until.'
           c.action do |_global_options, options, _args|
             puts JSON.dump(@client.dnd_setSnooze(options))
           end
diff --git a/lib/slack/web/api/endpoints/dnd.rb b/lib/slack/web/api/endpoints/dnd.rb
index 13ed42b8..0b1229d7 100644
--- a/lib/slack/web/api/endpoints/dnd.rb
+++ b/lib/slack/web/api/endpoints/dnd.rb
@@ -42,7 +42,7 @@ def dnd_info(options = {})
           # Turns on Do Not Disturb mode for the current user, or changes its duration.
           #
           # @option options [string] :num_minutes
-          #   Number of minutes, from now, to snooze until.
+          #   This argument is required. Number of minutes, from now, to snooze until.
           # @see https://api.slack.com/methods/dnd.setSnooze
           # @see https://github.com/slack-ruby/slack-api-ref/blob/master/methods/dnd/dnd.setSnooze.json
           def dnd_setSnooze(options = {})
diff --git a/lib/slack/web/api/slack-api-ref b/lib/slack/web/api/slack-api-ref
index f2e768a8..fc297d16 160000
--- a/lib/slack/web/api/slack-api-ref
+++ b/lib/slack/web/api/slack-api-ref
@@ -1 +1 @@
-Subproject commit f2e768a8c3e1d5106a600ce2414b48e986b7d39a
+Subproject commit fc297d162f74f0c32a9ae41d7fb7911ac2581abe