diff --git a/.travis.yml b/.travis.yml
index 99264b9cc..f18288045 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,6 +22,7 @@ _install_plugins: &install_plugins >-
   ep_hash_auth
   ep_headings2
   ep_markdown
+  ep_readonly_guest
   ep_spellcheck
   ep_subscript_and_superscript
   ep_table_of_contents