diff --git a/.eleventy.js b/.eleventy.js
index 6d13f5c..55c32d2 100644
--- a/.eleventy.js
+++ b/.eleventy.js
@@ -15,7 +15,7 @@ module.exports = function(eleventyConfig) {
   // only content in the `posts/` directory
   eleventyConfig.addCollection("posts", function(collection) {
     return collection.getAllSorted().filter(function(item) {
-      return item.inputPath.match(/^\.\/posts\//) !== null;
+      return item.inputPath.startsWith('./posts');
     });
   });