diff --git a/lib/netsuite/configuration.rb b/lib/netsuite/configuration.rb
index ad393176..1635f186 100644
--- a/lib/netsuite/configuration.rb
+++ b/lib/netsuite/configuration.rb
@@ -17,6 +17,7 @@ def attributes
     def connection(params={}, credentials={})
       client = Savon.client({
         wsdl: (credentials[:wsdl] && !credentials[:wsdl].empty?) ? credentials[:wsdl] : wsdl,
+        endpoint: credentials[:endpoint],
         read_timeout: read_timeout,
         namespaces: namespaces,
         soap_header: auth_header(credentials).update(soap_header),
@@ -79,7 +80,7 @@ def api_version(version = nil)
       if version
         self.api_version = version
       else
-        attributes[:api_version] ||= '2015_1'
+        attributes[:api_version] ||= '2023_1'
       end
     end
 
diff --git a/lib/netsuite/utilities.rb b/lib/netsuite/utilities.rb
index c0b0f2d9..b2bd8736 100644
--- a/lib/netsuite/utilities.rb
+++ b/lib/netsuite/utilities.rb
@@ -45,11 +45,11 @@ def netsuite_data_center_urls(account_id)
         #      as of 1/20/18 NS will start using the account ID to determine
         #      if a account is sandbox (123_SB1) as opposed to using a sandbox domain
 
-        wsdl: 'https://webservices.netsuite.com/wsdl/v2017_2_0/netsuite.wsdl',
+        wsdl: 'https://webservices.netsuite.com/wsdl/v2023_1_0/netsuite.wsdl',
 
         # NOTE don't inherit default namespace settings, it includes the API version
         namespaces: {
-          'xmlns:platformCore' => "urn:core_2017_2.platform.webservices.netsuite.com"
+          'xmlns:platformCore' => "urn:core_2023_1.platform.webservices.netsuite.com"
         },
 
         soap_header: {}