diff --git a/site-cookbooks/kosmos-mediawiki/recipes/default.rb b/site-cookbooks/kosmos-mediawiki/recipes/default.rb
index 261da2e..b1dd0b1 100644
--- a/site-cookbooks/kosmos-mediawiki/recipes/default.rb
+++ b/site-cookbooks/kosmos-mediawiki/recipes/default.rb
@@ -169,6 +169,7 @@ $wgGroupPermissions['team']['editsemiprotected']  = true;
 $wgGroupPermissions['team']['editprotected']  = true;
 $wgGroupPermissions['sysop']['edit'] = true;
 $wgEnableUploads = true;
+$wgFileExtensions = [ 'png', 'gif', 'jpg', 'jpeg', 'webp', 'svg' ];
 
 $wgExtraNamespaces[100] = "Feature";
 $wgNamespacesWithSubpages[100] = true;