diff --git a/httparty.gemspec b/httparty.gemspec
index a0f251b8..9ce269d7 100644
--- a/httparty.gemspec
+++ b/httparty.gemspec
@@ -15,6 +15,7 @@ Gem::Specification.new do |s|
 
   s.required_ruby_version     = '>= 2.3.0'
 
+  s.add_dependency 'csv'
   s.add_dependency 'multi_xml', ">= 0.5.2"
   s.add_dependency 'mini_mime', ">= 1.0.0"