README.md in paperclip-gcs-0.3.0 vs README.md in paperclip-gcs-0.3.1

@@ -182,9 +182,17 @@
 
 ### gcs_cache_control
 
 The Cache-Control metadata allows you to control whether and for how long browser and Internet caches are allowed to cache your objects.
 
+### gcs_content_disposition
+
+The Content-Disposition metadata allows you to specify the presentation of the object in the browser.
+
+### gcs_content_type
+
+The Content-Type metadata allows you to specify the content type of the object. By default it will use the file content type.
+
 ### Interpolates
 
 #### :gcs_alias_url
 
 ``` ruby