diff --git a/lib/acme/client/resources/account.rb b/lib/acme/client/resources/account.rb
index c739aa7..50d9c23 100644
--- a/lib/acme/client/resources/account.rb
+++ b/lib/acme/client/resources/account.rb
@@ -5,7 +5,7 @@ class Acme::Client::Resources::Account
 
   def initialize(client, **arguments)
     @client = client
-    assign_attributes(arguments)
+    assign_attributes(**arguments)
   end
 
   def kid
diff --git a/lib/acme/client/resources/authorization.rb b/lib/acme/client/resources/authorization.rb
index 8b7cd4e..7dcaaf7 100644
--- a/lib/acme/client/resources/authorization.rb
+++ b/lib/acme/client/resources/authorization.rb
@@ -5,7 +5,7 @@ class Acme::Client::Resources::Authorization
 
   def initialize(client, **arguments)
     @client = client
-    assign_attributes(arguments)
+    assign_attributes(**arguments)
   end
 
   def deactivate
diff --git a/lib/acme/client/resources/challenges/base.rb b/lib/acme/client/resources/challenges/base.rb
index 6d63dc5..5e91057 100644
--- a/lib/acme/client/resources/challenges/base.rb
+++ b/lib/acme/client/resources/challenges/base.rb
@@ -5,7 +5,7 @@ class Acme::Client::Resources::Challenges::Base
 
   def initialize(client, **arguments)
     @client = client
-    assign_attributes(arguments)
+    assign_attributes(**arguments)
   end
 
   def challenge_type
diff --git a/lib/acme/client/resources/order.rb b/lib/acme/client/resources/order.rb
index 4bbce5e..4651e89 100644
--- a/lib/acme/client/resources/order.rb
+++ b/lib/acme/client/resources/order.rb
@@ -5,7 +5,7 @@ class Acme::Client::Resources::Order
 
   def initialize(client, **arguments)
     @client = client
-    assign_attributes(arguments)
+    assign_attributes(**arguments)
   end
 
   def reload
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 97bb5b0..f330aa6 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -4,7 +4,6 @@
 require 'openssl'
 
 DIRECTORY_URL = ENV['ACME_DIRECTORY_URL'] || 'https://127.0.0.1/directory'
-OpenSSL::SSL::VERIFY_PEER = OpenSSL::SSL::VERIFY_NONE
 
 require 'acme/client'
 
@@ -19,9 +18,6 @@
 require 'tls_helper'
 require 'profile_helper' if ENV['RUBY_PROF']
 
-# pebble use self-signed certificate
-OpenSSL::SSL::VERIFY_PEER = OpenSSL::SSL::VERIFY_NONE
-
 RSpec.configure do |c|
   c.include Asn1Helper
   c.include HttpHelper