cose.gemspec in cose-0.10.0 vs cose.gemspec in cose-0.11.0

@@ -27,12 +27,13 @@
   end
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.required_ruby_version = ">= 2.3"
+  spec.required_ruby_version = ">= 2.4"
 
   spec.add_dependency "cbor", "~> 0.5.9"
+  spec.add_dependency "openssl-signature_algorithm", "~> 0.3.0"
 
   spec.add_development_dependency "appraisal", "~> 2.2.0"
   spec.add_development_dependency "bundler", ">= 1.17", "< 3"
   spec.add_development_dependency "byebug", "~> 11.0"
   spec.add_development_dependency "rake", "~> 13.0"