diff --git a/.conkerorrc/init.js b/.conkerorrc/init.js
index 8a932d3..1d1387c 100644
--- a/.conkerorrc/init.js
+++ b/.conkerorrc/init.js
@@ -173,7 +173,8 @@ remove_hook("download_added_hook", open_download_buffer_automatically);
 hints_minibuffer_annotation_mode(true);
 theme_load("yoshi");
 
-external_content_handlers.set("application/pdf", "xpdf");
+external_content_handlers.set("application/pdf", "zathura");
+external_content_handlers.set("application/vnd.ms-excel", "libreoffice");
 
 var gh_url = "http://github.com/";
 function read_url_github_ad_command_handler(input)