diff --git a/spec/web/authorize_spec.rb b/spec/web/authorize_spec.rb
index 503ff7f..90a2b23 100644
--- a/spec/web/authorize_spec.rb
+++ b/spec/web/authorize_spec.rb
@@ -84,7 +84,7 @@
     end
 
     it 'should generate valid form field string' do
-      if Gem.loaded_specs['activesupport'].version >= Gem::Version.create('6.0')
+      if Gem.loaded_specs['activesupport'].version >= Gem::Version.create('6.1')
         expected_output = '<input type="hidden" name="merchantId" id="merchantId" value="1100000000" autocomplete="off" /><input type="hidden" name="hiddenMode" id="hiddenMode" value="yes" autocomplete="off" /><input type="hidden" name="reqtype" id="reqtype" value="NOA" autocomplete="off" /><input type="hidden" name="amount" id="amount" value="1000" autocomplete="off" /><input type="hidden" name="currency" id="currency" value="CHF" autocomplete="off" /><input type="hidden" name="useAlias" id="useAlias" value="yes" autocomplete="off" /><input type="hidden" name="sign" id="sign" value="0402fb3fba8c6fcb40df9b7756e7e637" autocomplete="off" /><input type="hidden" name="refno" id="refno" value="ABCDEF" autocomplete="off" /><input type="hidden" name="uppCustomerDetails" id="uppCustomerDetails" autocomplete="off" /><input type="hidden" name="uppCustomerEmail" id="uppCustomerEmail" value="customer@email.com" autocomplete="off" />'
       else
         expected_output = '<input type="hidden" name="merchantId" id="merchantId" value="1100000000" /><input type="hidden" name="hiddenMode" id="hiddenMode" value="yes" /><input type="hidden" name="reqtype" id="reqtype" value="NOA" /><input type="hidden" name="amount" id="amount" value="1000" /><input type="hidden" name="currency" id="currency" value="CHF" /><input type="hidden" name="useAlias" id="useAlias" value="yes" /><input type="hidden" name="sign" id="sign" value="0402fb3fba8c6fcb40df9b7756e7e637" /><input type="hidden" name="refno" id="refno" value="ABCDEF" /><input type="hidden" name="uppCustomerDetails" id="uppCustomerDetails" /><input type="hidden" name="uppCustomerEmail" id="uppCustomerEmail" value="customer@email.com" />'