diff --git a/language_detection.gemspec b/language_detection.gemspec
index 268ee61..9d4cbb0 100644
--- a/language_detection.gemspec
+++ b/language_detection.gemspec
@@ -22,12 +22,13 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
   gem.extensions    = ["ext/cld/extconf.rb"]
 
-  gem.add_runtime_dependency "ffi", "~> 1.15"
+  gem.add_runtime_dependency "ffi", "~> 1.17"
 
   gem.add_development_dependency "rake", "~> 13"
   gem.add_development_dependency "shoulda", "~> 4"
   gem.add_development_dependency "mocha", "~> 2"
   gem.add_development_dependency "test-unit", "~> 3"
+  gem.add_development_dependency "csv", "~> 3"
 
-  gem.required_ruby_version = [ ">= 2.5.0", "< 3.3.0" ]
+  gem.required_ruby_version = [ ">= 2.5.0", "< 3.5" ]
 end