diff --git a/xirr.gemspec b/xirr.gemspec
index b630ca0..8147d27 100644
--- a/xirr.gemspec
+++ b/xirr.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.required_ruby_version = '>=2.2.2'
-  spec.add_dependency 'activesupport', '>= 4.1', '< 6.2'
+  spec.add_dependency 'activesupport', '>= 4.1', '< 7.1'
 
   spec.add_development_dependency 'activesupport', '~> 4.1.0'
   spec.add_development_dependency 'minitest', '~> 5.11'