diff --git a/lib/gtfs/model.rb b/lib/gtfs/model.rb
index 8e7eed7..3f03c27 100644
--- a/lib/gtfs/model.rb
+++ b/lib/gtfs/model.rb
@@ -1,4 +1,4 @@
-require 'CSV'
+require 'csv'
 
 module GTFS
   module Model
diff --git a/lib/gtfs/url_source.rb b/lib/gtfs/url_source.rb
index b707a8b..b276456 100644
--- a/lib/gtfs/url_source.rb
+++ b/lib/gtfs/url_source.rb
@@ -1,5 +1,5 @@
 require 'net/http'
-require 'URI'
+require 'uri'
 
 module GTFS
   class URLSource < Source