diff --git a/_config.ts b/_config.ts
index 11c73e758..ea18d482b 100644
--- a/_config.ts
+++ b/_config.ts
@@ -11,6 +11,7 @@ import sitemap from "lume/plugins/sitemap.ts";
 import tailwindConfig from "./tailwind.config.js";
 
 import "npm:prismjs@1.29.0/components/prism-typescript.js";
+import "npm:prismjs@1.29.0/components/prism-diff.js";
 
 import { full as emoji } from "npm:markdown-it-emoji@3";
 import anchor from "npm:markdown-it-anchor@9";