diff --git a/influxdb-client.gemspec b/influxdb-client.gemspec
index 1da6e11..7b97a57 100644
--- a/influxdb-client.gemspec
+++ b/influxdb-client.gemspec
@@ -44,6 +44,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
   spec.required_ruby_version = '>= 2.2.0'
 
+  spec.add_dependency 'csv'
   spec.add_development_dependency 'bundler', '~> 2.0'
   spec.add_development_dependency 'minitest', '5.15.0'
   spec.add_development_dependency 'minitest-reporters', '~> 1.4'