diff --git a/lib/speed_limiter/throttle_params.rb b/lib/speed_limiter/throttle_params.rb
index 9403869..f5eb2f9 100644
--- a/lib/speed_limiter/throttle_params.rb
+++ b/lib/speed_limiter/throttle_params.rb
@@ -5,12 +5,18 @@
 module SpeedLimiter
   # Throttle params model
   class ThrottleParams
+    KNOWN_OPTIONS = %i[on_throttled retry].freeze
+
     def initialize(config:, key:, limit:, period:, **options)
       @config = config
       @key = key
       @limit = limit
       @period = period
       @options = options
+
+      return unless (unknown_options = options.keys - KNOWN_OPTIONS).any?
+
+      raise ArgumentError, "Unknown options: #{unknown_options.join(', ')}"
     end
 
     attr_reader :config, :key, :limit, :period
diff --git a/spec/speed_limiter/throttle_params_spec.rb b/spec/speed_limiter/throttle_params_spec.rb
new file mode 100644
index 0000000..4f1dc02
--- /dev/null
+++ b/spec/speed_limiter/throttle_params_spec.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe SpeedLimiter::Throttle do
+  let!(:config) { SpeedLimiter::Config.new }
+
+  describe "#new" do
+    context "with unknown options" do
+      it "raises ArgumentError" do
+        expect { described_class.new(config: config, key: SecureRandom.uuid, limit: 1, period: 1, unknown: true) }
+          .to raise_error(ArgumentError)
+      end
+    end
+  end
+end