diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index a23112d..7ca7ce7 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -8,7 +8,9 @@ on:
     - main
 jobs:
   test:
-    runs-on: ubuntu-latest
+    # Ruby 3.0 and 3.1 builds aren't available for Ubuntu 26.04, which
+    # ubuntu-latest now points to.
+    runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
       matrix:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 23db9a1..f439c87 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- `headers` request option to send custom HTTP headers with a check
+
 ## [0.9.0] - 2024-04-18
 
 ### Added
diff --git a/lib/freno/client.rb b/lib/freno/client.rb
index 36505e1..4674bb5 100644
--- a/lib/freno/client.rb
+++ b/lib/freno/client.rb
@@ -233,7 +233,7 @@ def decorated(request)
         outermost = to_decorate[0]
         current = outermost
 
-        (to_decorate[1..]).each do |decorator|
+        to_decorate[1..].each do |decorator|
           current.request = decorator
           current = current.request
         end
diff --git a/lib/freno/client/errors.rb b/lib/freno/client/errors.rb
index afbb591..fbbb7a1 100644
--- a/lib/freno/client/errors.rb
+++ b/lib/freno/client/errors.rb
@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
 module Freno
-  Error = Class.new(StandardError)
+  class Error < StandardError
+  end
 end
diff --git a/lib/freno/client/preconditions.rb b/lib/freno/client/preconditions.rb
index a49174b..2c5ed55 100644
--- a/lib/freno/client/preconditions.rb
+++ b/lib/freno/client/preconditions.rb
@@ -5,7 +5,8 @@ class Client
     module Preconditions
       module_function
 
-      PreconditionNotMet = Class.new(ArgumentError)
+      class PreconditionNotMet < ArgumentError
+      end
 
       class Checker
         attr_reader :errors
diff --git a/lib/freno/client/request.rb b/lib/freno/client/request.rb
index 2b36935..53e84e0 100644
--- a/lib/freno/client/request.rb
+++ b/lib/freno/client/request.rb
@@ -9,7 +9,7 @@ class Client
     class Request
       include Freno::Client::Preconditions
 
-      attr_reader :faraday, :args, :options, :raise_on_timeout
+      attr_reader :faraday, :args, :options, :raise_on_timeout, :headers
 
       def self.perform(**kwargs)
         new(**kwargs).perform
@@ -22,6 +22,7 @@ def initialize(**kwargs)
 
         @raise_on_timeout = options.fetch(:raise_on_timeout, true)
         @verb = options.fetch(:verb, :head)
+        @headers = options.fetch(:headers, nil)
       end
 
       def perform
@@ -38,7 +39,7 @@ def perform
       protected
 
       def request(verb, path, params)
-        faraday.send(verb, path, params)
+        faraday.send(verb, path, params, headers)
       end
 
       def path
diff --git a/test/freno/client/requests/check_test.rb b/test/freno/client/requests/check_test.rb
index 931e664..4c1c371 100644
--- a/test/freno/client/requests/check_test.rb
+++ b/test/freno/client/requests/check_test.rb
@@ -79,4 +79,25 @@ def test_perform_calls_the_proper_service_endpoint_with_low_priority_and_succeed
     assert_equal 200, response.code
     assert_equal({ "StatusCode" => 200, "Value" => 0.025075, "Threshold" => 1, "Message" => "" }, response.body)
   end
+
+  def test_perform_sends_custom_headers
+    faraday = stubbed_faraday do |stub|
+      stub.head("/check/github/mysql/main") do |env|
+        assert_equal "1", env.request_headers["X-Example"]
+        [200, {}, <<-BODY]
+          {"StatusCode":200, "Value":0.025075, "Threshold":1, "Message":""}
+        BODY
+      end
+    end
+
+    request = Check.new(
+      faraday: faraday,
+      app: "github",
+      store_type: "mysql",
+      store_name: "main",
+      options: { headers: { "X-Example" => "1" } }
+    )
+
+    assert_equal :ok, request.perform.meaning
+  end
 end