diff --git a/Gemfile.lock b/Gemfile.lock
index e531964..a6eec51 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    authsignal-ruby (5.3.0)
+    authsignal-ruby (5.4.0)
       base64
       faraday (>= 2.0.1)
       faraday-retry (~> 2.2)
diff --git a/lib/authsignal.rb b/lib/authsignal.rb
index 4bc4353..170e38e 100644
--- a/lib/authsignal.rb
+++ b/lib/authsignal.rb
@@ -104,8 +104,8 @@ def update_action(user_id:, action:, idempotency_key:, attributes:)
       handle_response(response)
     end
 
-    def challenge(verification_method:, action:, **options)
-      response = Client.new.challenge(verification_method: verification_method, action: action, **options)
+    def challenge(**options)
+      response = Client.new.challenge(**options)
 
       handle_response(response)
     end
diff --git a/lib/authsignal/client.rb b/lib/authsignal/client.rb
index 6c99d33..186e5cc 100644
--- a/lib/authsignal/client.rb
+++ b/lib/authsignal/client.rb
@@ -124,8 +124,9 @@ def update_action(user_id:, action:, idempotency_key:, attributes:)
     end
 
     def challenge(
-      verification_method:,
-      action:,
+      verification_method: nil,
+      action: nil,
+      challenge_id: nil,
       idempotency_key: nil,
       user_id: nil,
       email: nil,
@@ -141,6 +142,7 @@ def challenge(
       body = {
         verification_method: verification_method,
         action: action,
+        challenge_id: challenge_id,
         idempotency_key: idempotency_key,
         user_id: user_id,
         email: email,
diff --git a/lib/authsignal/version.rb b/lib/authsignal/version.rb
index 51039a0..ac20d25 100644
--- a/lib/authsignal/version.rb
+++ b/lib/authsignal/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Authsignal
-  VERSION = '5.3.0'
+  VERSION = '5.4.0'
 end