diff --git a/cookbooks/mediawiki/recipes/default.rb b/cookbooks/mediawiki/recipes/default.rb
index c7249e8fa..d784e7b7f 100644
--- a/cookbooks/mediawiki/recipes/default.rb
+++ b/cookbooks/mediawiki/recipes/default.rb
@@ -41,6 +41,7 @@
   composer
   unzip
   ffmpeg
+  firejail
 ]
 
 # Mediawiki enhanced difference engine