lib/dynamic_image/model.rb in dynamic_image-2.1.4 vs lib/dynamic_image/model.rb in dynamic_image-2.1.5

@@ -98,11 +98,12 @@
     end
 
     # Includes a timestamp fingerprint in the URL param, so
     # that rendered images can be cached indefinitely.
     def to_param
-      [id, updated_at.utc.to_s(cache_timestamp_format)].join("-")
+      [id, updated_at.utc.to_formatted_s(cache_timestamp_format)].join("-")
     end
+
 
     private
 
     def read_image_metadata
       metadata = DynamicImage::Metadata.new(data)