diff --git a/lib/privy/public_api/services/key_quorums.rb b/lib/privy/public_api/services/key_quorums.rb
index 03e34c9..bd7d8c5 100644
--- a/lib/privy/public_api/services/key_quorums.rb
+++ b/lib/privy/public_api/services/key_quorums.rb
@@ -47,16 +47,20 @@ def create(key_quorum_create_params:, request_options: nil)
       # @option key_quorum_update_params [Array<String>, nil] :user_ids User IDs to authorize.
       # @option key_quorum_update_params [Array<String>, nil] :key_quorum_ids Nested key quorum IDs.
       # @param authorization_context [Privy::Authorization::AuthorizationContext, nil] Authorization context for signing.
+      # @param request_expiry [Integer, nil] Absolute Unix-ms timestamp at which the
+      #   request expires. Defaults to the value computed by the client's
+      #   PrivyRequestExpiryOptions.
       # @param request_options [Privy::RequestOptions, Hash, nil] Transport-level config (timeouts, retries).
       #
       # @return [Privy::Models::KeyQuorum]
-      def update(key_quorum_id, key_quorum_update_params:, authorization_context: nil, request_options: nil)
+      def update(key_quorum_id, key_quorum_update_params:, authorization_context: nil, request_expiry: nil, request_options: nil)
         prepared = Privy::Authorization.prepare_request(
           privy_client,
           method: :patch,
           url: Privy::Authorization.signed_url(privy_client, "v1/key_quorums/#{key_quorum_id}"),
           body: key_quorum_update_params,
-          authorization_context: authorization_context
+          authorization_context: authorization_context,
+          request_expiry: privy_client.compute_request_expiry(request_expiry)
         )
         combined_params = key_quorum_update_params.merge(request_options: request_options)
         Privy::Authorization.merge_prepared_headers!(combined_params, prepared.headers)
@@ -70,16 +74,20 @@ def update(key_quorum_id, key_quorum_update_params:, authorization_context: nil,
       #
       # @param key_quorum_id [String] ID of the key quorum to delete.
       # @param authorization_context [Privy::Authorization::AuthorizationContext, nil] Authorization context for signing.
+      # @param request_expiry [Integer, nil] Absolute Unix-ms timestamp at which the
+      #   request expires. Defaults to the value computed by the client's
+      #   PrivyRequestExpiryOptions.
       # @param request_options [Privy::RequestOptions, Hash, nil] Transport-level config (timeouts, retries).
       #
       # @return [Privy::Models::SuccessResponse]
-      def delete(key_quorum_id, authorization_context: nil, request_options: nil)
+      def delete(key_quorum_id, authorization_context: nil, request_expiry: nil, request_options: nil)
         prepared = Privy::Authorization.prepare_request(
           privy_client,
           method: :delete,
           url: Privy::Authorization.signed_url(privy_client, "v1/key_quorums/#{key_quorum_id}"),
           body: "",
-          authorization_context: authorization_context
+          authorization_context: authorization_context,
+          request_expiry: privy_client.compute_request_expiry(request_expiry)
         )
         # Workaround: the Stainless-generated Ruby client sends Content-Type: application/json on
         # every request (lib/privy/internal/transport/base_client.rb:204), even bodyless DELETEs.
diff --git a/test/privy/public_api/services/key_quorums_test.rb b/test/privy/public_api/services/key_quorums_test.rb
new file mode 100644
index 0000000..d8658b2
--- /dev/null
+++ b/test/privy/public_api/services/key_quorums_test.rb
@@ -0,0 +1,104 @@
+# frozen_string_literal: true
+
+require_relative "../../test_helper"
+
+class Privy::Services::KeyQuorumsTest < Minitest::Test
+  extend Minitest::Serial
+  include WebMock::API
+
+  BASE_URL = "https://api.staging.privy.io"
+
+  def before_all
+    super
+    WebMock.enable!
+  end
+
+  def after_all
+    WebMock.disable!
+    super
+  end
+
+  def teardown
+    WebMock.reset!
+    super
+  end
+
+  def build_client(**opts)
+    Privy::PrivyClient.new(app_id: "app-abc", app_secret: "secret", environment: :staging, **opts)
+  end
+
+  def key_quorum_response_body(**overrides)
+    {
+      id: "kq-1",
+      authorization_keys: [],
+      authorization_threshold: 1.0,
+      display_name: nil,
+      user_ids: nil
+    }.merge(overrides).to_json
+  end
+
+  def stub_json(method, url, body:)
+    stub_request(method, url).to_return(
+      status: 200,
+      body: body,
+      headers: {"content-type" => "application/json"}
+    )
+  end
+
+  # --- request_expiry on update ----------------------------------------------
+
+  def test_update_default_request_expiry_is_auto_set
+    stub_json(:patch, "#{BASE_URL}/v1/key_quorums/kq-1", body: key_quorum_response_body)
+    before = Process.clock_gettime(Process::CLOCK_REALTIME, :millisecond)
+    build_client.key_quorums.update("kq-1", key_quorum_update_params: {authorization_threshold: 1})
+    assert_requested(:patch, "#{BASE_URL}/v1/key_quorums/kq-1") do |req|
+      assert_in_delta(before + (15 * 60 * 1_000), req.headers["Privy-Request-Expiry"].to_i, 5_000)
+    end
+  end
+
+  def test_update_per_call_request_expiry_overrides_default
+    stub_json(:patch, "#{BASE_URL}/v1/key_quorums/kq-1", body: key_quorum_response_body)
+    build_client.key_quorums.update(
+      "kq-1",
+      key_quorum_update_params: {authorization_threshold: 1},
+      request_expiry: 1_750_000_000_000
+    )
+    assert_requested(:patch, "#{BASE_URL}/v1/key_quorums/kq-1") do |req|
+      assert_equal("1750000000000", req.headers["Privy-Request-Expiry"])
+    end
+  end
+
+  def test_update_disabled_options_omit_header
+    stub_json(:patch, "#{BASE_URL}/v1/key_quorums/kq-1", body: key_quorum_response_body)
+    build_client(request_expiry: Privy::PrivyRequestExpiryOptions.build(disabled: true))
+      .key_quorums.update("kq-1", key_quorum_update_params: {authorization_threshold: 1})
+    assert_requested(:patch, "#{BASE_URL}/v1/key_quorums/kq-1") do |req|
+      refute(req.headers.key?("Privy-Request-Expiry"))
+    end
+  end
+
+  def test_update_disabled_options_still_honor_explicit_override
+    stub_json(:patch, "#{BASE_URL}/v1/key_quorums/kq-1", body: key_quorum_response_body)
+    build_client(request_expiry: Privy::PrivyRequestExpiryOptions.build(disabled: true))
+      .key_quorums.update(
+        "kq-1",
+        key_quorum_update_params: {authorization_threshold: 1},
+        request_expiry: 1_750_000_000_000
+      )
+    assert_requested(:patch, "#{BASE_URL}/v1/key_quorums/kq-1") do |req|
+      assert_equal("1750000000000", req.headers["Privy-Request-Expiry"])
+    end
+  end
+
+  # --- request_expiry on delete ----------------------------------------------
+
+  def test_delete_per_call_request_expiry_overrides_default
+    stub_request(:delete, "#{BASE_URL}/v1/key_quorums/kq-1").to_return(
+      status: 200, body: '{"success":true}', headers: {"content-type" => "application/json"}
+    )
+    build_client.key_quorums.delete("kq-1", request_expiry: 1_750_000_000_000)
+    assert_requested(:delete, "#{BASE_URL}/v1/key_quorums/kq-1") do |req|
+      assert_equal("1750000000000", req.headers["Privy-Request-Expiry"])
+    end
+  end
+end