diff --git a/lib/sf.rb b/lib/sf.rb
index 0295790..affd566 100644
--- a/lib/sf.rb
+++ b/lib/sf.rb
@@ -34,7 +34,8 @@ def client
                                   password: sfdc_auth_config['password'],
                                   security_token: sfdc_auth_config['security_token'],
                                   client_id: sfdc_auth_config['client_id'],
-                                  client_secret: sfdc_auth_config['client_secret']
+                                  client_secret: sfdc_auth_config['client_secret'],
+                                  api_version: sfdc_auth_config['api_version'] || '41.0'
         end
       else
         @client
diff --git a/lib/sf/version.rb b/lib/sf/version.rb
index 55bdcd5..38c8631 100644
--- a/lib/sf/version.rb
+++ b/lib/sf/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Sf
-  VERSION = '0.1.73'
+  VERSION = '0.1.74'
 end
diff --git a/sf.gemspec b/sf.gemspec
index df8e861..91e2186 100644
--- a/sf.gemspec
+++ b/sf.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ['lib']
 
-  spec.add_dependency 'restforce', '~> 5.3'
-  spec.add_development_dependency 'bundler', '~> 2.2'
+  spec.add_dependency 'restforce', '~> 6.0.0'
+  spec.add_development_dependency 'bundler', '~> 2.3'
   spec.add_development_dependency 'rake', '~> 13.0'
 end