diff --git a/google-cloud-channel/.rubocop.yml b/google-cloud-channel/.rubocop.yml
index 4aabdec20834..c04e816aa677 100644
--- a/google-cloud-channel/.rubocop.yml
+++ b/google-cloud-channel/.rubocop.yml
@@ -20,6 +20,3 @@ Metrics/BlockLength:
 Naming/FileName:
   Exclude:
     - "lib/google-cloud-channel.rb"
-
-Style/AsciiComments:
-  Enabled: false
diff --git a/google-cloud-channel/README.md b/google-cloud-channel/README.md
index 12886befd1ee..99e1736075c2 100644
--- a/google-cloud-channel/README.md
+++ b/google-cloud-channel/README.md
@@ -62,11 +62,11 @@ end
 
 ## Supported Ruby Versions
 
-This library is supported on Ruby 2.4+.
+This library is supported on Ruby 2.5+.
 
 Google provides official support for Ruby versions that are actively supported
 by Ruby Core—that is, Ruby versions that are either in normal maintenance or
-in security maintenance, and not end of life. Currently, this means Ruby 2.4
+in security maintenance, and not end of life. Currently, this means Ruby 2.5
 and later. Older versions of Ruby _may_ still work, but are unsupported and not
 recommended. See https://www.ruby-lang.org/en/downloads/branches/ for details
 about the Ruby support schedule.
diff --git a/google-cloud-channel/google-cloud-channel.gemspec b/google-cloud-channel/google-cloud-channel.gemspec
index e4b7bd3450cd..60fe0504c2a9 100644
--- a/google-cloud-channel/google-cloud-channel.gemspec
+++ b/google-cloud-channel/google-cloud-channel.gemspec
@@ -20,12 +20,12 @@ Gem::Specification.new do |gem|
                       ["README.md", "AUTHENTICATION.md", "LICENSE.md", ".yardopts"]
   gem.require_paths = ["lib"]
 
-  gem.required_ruby_version = ">= 2.4"
+  gem.required_ruby_version = ">= 2.5"
 
   gem.add_dependency "google-cloud-channel-v1", "~> 0.0"
   gem.add_dependency "google-cloud-core", "~> 1.5"
 
-  gem.add_development_dependency "google-style", "~> 1.24.0"
+  gem.add_development_dependency "google-style", "~> 1.25.1"
   gem.add_development_dependency "minitest", "~> 5.14"
   gem.add_development_dependency "minitest-focus", "~> 1.1"
   gem.add_development_dependency "minitest-rg", "~> 5.2"
diff --git a/google-cloud-channel/synth.metadata b/google-cloud-channel/synth.metadata
index 16647d7644a1..2c7f071d4fd1 100644
--- a/google-cloud-channel/synth.metadata
+++ b/google-cloud-channel/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/google-cloud-ruby.git",
-        "sha": "c830c7d6f7b45ddb90cafc77707b1ecf323e600b"
+        "sha": "940404e086b1ea483ee79fd879d67c1c368790df"
       }
     },
     {