diff --git a/lib/wayback_machine_downloader/archive_api.rb b/lib/wayback_machine_downloader/archive_api.rb
index 7282ea1..4a33a45 100644
--- a/lib/wayback_machine_downloader/archive_api.rb
+++ b/lib/wayback_machine_downloader/archive_api.rb
@@ -10,9 +10,11 @@ module ArchiveAPI
 	end
 
 	def parameters_for_api
-		parameters = "&fl=timestamp,original&collapse=original&gzip=false"
-    unless @all
-      parameters += "&filter=statuscode:200"
+		parameters = "&fl=timestamp,original&gzip=false"
+    if @all
+      parameters += "&collapse=digest"
+    else
+      parameters += "&filter=statuscode:200&collapse=original"
     end
     if @from_timestamp and @from_timestamp != 0
       parameters += "&from=" + @from_timestamp.to_s