diff --git a/astro.config.mjs b/astro.config.mjs
index 2f86e9d..04c6feb 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -11,4 +11,7 @@ const tailwindIntegration = tailwind({
 export default defineConfig({
   integrations: [mdx(), tailwindIntegration],
   legacy: { collections: true },
+  markdown: {
+    shikiConfig: { theme: 'catppuccin-mocha' },
+  },
 });