diff --git a/.eleventy.js b/.eleventy.js
index 1dd8b91..8e82c3c 100644
--- a/.eleventy.js
+++ b/.eleventy.js
@@ -54,12 +54,6 @@ module.exports = function(eleventyConfig) {
     return [...tagSet]
   })
 
-  // Copy the `img` and `css` folders to the output
-  // ki9: passthrough done by template languages, see below
-  //eleventyConfig.addPassthroughCopy('img')
-  //eleventyConfig.addPassthroughCopy('css')
-  eleventyConfig.addPassthroughCopy('ca.crt')
-
   // Customize Markdown library and settings:
   let markdownLibrary = markdownIt({
     html: true,
@@ -103,6 +97,7 @@ module.exports = function(eleventyConfig) {
       'jpg',
       'gif',
       'js',
+      'crt',
     ],
 
     // -----------------------------------------------------------------