diff --git a/io-stream.gemspec b/io-stream.gemspec
index 48e7e87..5b940ad 100644
--- a/io-stream.gemspec
+++ b/io-stream.gemspec
@@ -23,4 +23,6 @@ Gem::Specification.new do |spec|
 	spec.files = Dir.glob(["{context,lib}/**/*", "*.md"], File::FNM_DOTMATCH, base: __dir__)
 	
 	spec.required_ruby_version = ">= 3.3"
+
+	spec.add_dependency "openssl", ">= 3.3"
 end