diff --git a/camunda-workflow.gemspec b/camunda-workflow.gemspec
index 74050c9..5d4c0eb 100644
--- a/camunda-workflow.gemspec
+++ b/camunda-workflow.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'activesupport', '>= 3.2.0'
   spec.add_development_dependency 'pry-rescue', '~> 1.5.0'
   spec.add_development_dependency 'pry-stack_explorer', '~> 0.4.9.3'
-  spec.add_development_dependency 'rails', '~> 6.0.1'
+  spec.add_development_dependency 'rails', '>= 7.0.2'
   spec.add_development_dependency 'rspec', '~> 3.9.0'
   spec.add_development_dependency 'rubocop', '~> 0.77'
   spec.add_development_dependency 'rubocop-rspec', '~> 1.37.0'
diff --git a/lib/camunda/workflow.rb b/lib/camunda/workflow.rb
index 678273e..8ffa7f1 100644
--- a/lib/camunda/workflow.rb
+++ b/lib/camunda/workflow.rb
@@ -1,3 +1,4 @@
+require "active_support/core_ext/integer/time"
 module Camunda
   ##
   # Default configuration file for camunda-workflow. These defaults can be overridden using an
diff --git a/spec/dummy/config/application.rb b/spec/dummy/config/application.rb
index 7b8eee4..cd451a9 100644
--- a/spec/dummy/config/application.rb
+++ b/spec/dummy/config/application.rb
@@ -8,7 +8,7 @@
 module Dummy
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
-    config.load_defaults 6.0
+    config.load_defaults 7.0
 
 
     # Settings in config/environments/* take precedence over those specified here.