diff --git a/fintoc.gemspec b/fintoc.gemspec
index 3cb04d7..b7dd96f 100644
--- a/fintoc.gemspec
+++ b/fintoc.gemspec
@@ -9,7 +9,7 @@ Gem::Specification.new do |spec|
   spec.summary       = 'The official Ruby client for the Fintoc API.'
   spec.description   = 'The official Ruby client for the Fintoc API.'
   spec.homepage      = 'https://github.com/fintoc-com/fintoc-ruby'
-  spec.required_ruby_version = Gem::Requirement.new('>= 2.3.0')
+  spec.required_ruby_version = Gem::Requirement.new('>= 2.6.0')
 
   # spec.metadata["allowed_push_host"] = "TODO: Set to 'http://mygemserver.com'"