diff --git a/lib/twitter_ebooks/archive.rb b/lib/twitter_ebooks/archive.rb
index d0776e3..8503576 100644
--- a/lib/twitter_ebooks/archive.rb
+++ b/lib/twitter_ebooks/archive.rb
@@ -92,8 +92,8 @@ def sync_to(file)
         begin
           new = @client.user_timeline(@username, opts)
         rescue Twitter::Error::TooManyRequests
-          log "Rate limit exceeded. Waiting for 5 mins before retry."
-          sleep 60*5
+          log "Rate limit exceeded. Waiting for 15 mins before retry."
+          sleep 60*15
           retry
         end
         break if new.length <= 1